1
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Opherden D, Tepaske MSJ, Bärtl F, Weber M, Turnbull MM, Lancaster T, Blundell SJ, Baenitz M, Wosnitza J, Landee CP, Moessner R, Luitz DJ, Kühne H. Field-Tunable Berezinskii-Kosterlitz-Thouless Correlations in a Heisenberg Magnet. PHYSICAL REVIEW LETTERS 2023; 130:086704. [PMID: 36898116 DOI: 10.1103/physrevlett.130.086704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 01/18/2023] [Indexed: 06/18/2023]
Abstract
We report the manifestation of field-induced Berezinskii-Kosterlitz-Thouless (BKT) correlations in the weakly coupled spin-1/2 Heisenberg layers of the molecular-based bulk material [Cu(pz)_{2}(2-HOpy)_{2}](PF_{6})_{2}. At zero field, a transition to long-range order occurs at 1.38 K, caused by a weak intrinsic easy-plane anisotropy and an interlayer exchange of J^{'}/k_{B}≈1 mK. Because of the moderate intralayer exchange coupling of J/k_{B}=6.8 K, the application of laboratory magnetic fields induces a substantial XY anisotropy of the spin correlations. Crucially, this provides a significant BKT regime, as the tiny interlayer exchange J^{'} only induces 3D correlations upon close approach to the BKT transition with its exponential growth in the spin-correlation length. We employ nuclear magnetic resonance measurements to probe the spin correlations that determine the critical temperatures of the BKT transition as well as that of the onset of long-range order. Further, we perform stochastic series expansion quantum Monte Carlo simulations based on the experimentally determined model parameters. Finite-size scaling of the in-plane spin stiffness yields excellent agreement of critical temperatures between theory and experiment, providing clear evidence that the nonmonotonic magnetic phase diagram of [Cu(pz)_{2}(2-HOpy)_{2}](PF_{6})_{2} is determined by the field-tuned XY anisotropy and the concomitant BKT physics.
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Affiliation(s)
- D Opherden
- Hochfeld-Magnetlabor Dresden (HLD-EMFL) and Würzburg-Dresden Cluster of Excellence ct.qmat, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
| | - M S J Tepaske
- Physikalisches Institut, Universität Bonn, Nussallee 12, 53115 Bonn, Germany
- Max Planck Institute for the Physics of Complex Systems, 01187 Dresden, Germany
| | - F Bärtl
- Hochfeld-Magnetlabor Dresden (HLD-EMFL) and Würzburg-Dresden Cluster of Excellence ct.qmat, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
- Institut für Festkörper- und Materialphysik, TU Dresden, 01062 Dresden, Germany
| | - M Weber
- Max Planck Institute for the Physics of Complex Systems, 01187 Dresden, Germany
| | - M M Turnbull
- Carlson School of Chemistry, Clark University, Worcester, Massachusetts 01610, USA
| | - T Lancaster
- Department of Physics, Centre for Materials Physics, Durham University, Durham DH1 3LE, United Kingdom
| | - S J Blundell
- Clarendon Laboratory, Department of Physics, University of Oxford, Park Road, Oxford OX1 3PU, United Kingdom
| | - M Baenitz
- Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
| | - J Wosnitza
- Hochfeld-Magnetlabor Dresden (HLD-EMFL) and Würzburg-Dresden Cluster of Excellence ct.qmat, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
- Institut für Festkörper- und Materialphysik, TU Dresden, 01062 Dresden, Germany
| | - C P Landee
- Department of Physics, Clark University, Worcester, Massachusetts 01610, USA
| | - R Moessner
- Max Planck Institute for the Physics of Complex Systems, 01187 Dresden, Germany
| | - D J Luitz
- Physikalisches Institut, Universität Bonn, Nussallee 12, 53115 Bonn, Germany
- Max Planck Institute for the Physics of Complex Systems, 01187 Dresden, Germany
| | - H Kühne
- Hochfeld-Magnetlabor Dresden (HLD-EMFL) and Würzburg-Dresden Cluster of Excellence ct.qmat, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
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2
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Monroe JC, Carvajal MA, Landee CP, Deumal M, Turnbull MM, Wikaira JL, Dawe LN. Approaching the isotropic spin-ladder regime: structure and magnetism of all-pyrazine-bridged copper(II)-based antiferromagnetic ladders. Dalton Trans 2022; 51:4653-4667. [PMID: 35212329 DOI: 10.1039/d1dt04219j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The crystal structure and magnetic properties of two all-pyrazine-bridged antiferromagnetic spin ladders are reported. The complexes, catena-(bis(3-X-4-pyridone)(μ-pyrazine)copper(II)(-μ-pyrazine)diperchlorate ([Cu(pz)1.5(L)2](ClO4)2 where L = 3-X-4-pyridone and X = Br (1) or Cl (2)), contain copper(II)-based ladders in which both the rung and rail bridges are pyrazine molecules bonded through the x2-y2 orbital of the copper(II) ions. This structural scaffold is proposed to approach the isotropic spin-ladder regime. 1 and 2 crystallize in the monoclinic space group P21/c. Due to the bulk of the 3-X-4-HOpy ligands, the ladders are well isolated in the a-direction (1, 15.6 Å; 2, 15.5 Å). The ladders, which run in the b-direction, are stacked in the c-direction with the separation (1, 7.87 Å; 2, 7.82 Å) between copper(II) ions caused by the bulk of a semi-coordinate perchlorate ion coordinated in the axial position. Computational evaluation of magnetic JAB couplings between Cu-moieties of 2 supports the experimentally proposed magnetic topology and agrees with an isolated isotropic spin-ladder (Jrail = -4.04 cm-1 (-5.77 K) and Jrung = -3.89 cm-1 (-5.56 K)). These complexes introduce a convenient scaffold for synthesizing isotropic spin-ladders with modest superexchange interactions, the strength of which may be tuned by variations in L. The magnetic susceptibility down to 1.8 K, for both compounds, is well described by the strong-rung ladder model giving nearly isotropic exchange with Jrung ≈ Jrail ≈ -5.5 K (1) and -5.9 K (2) using the Hamiltonian. Theoretical simulations of the magnetic response of 2 using the isotropic ladder model are in excellent agreement with experiment. The measured magnetization to 5 T indicates a quantum-dominated magnetic spectrum. Again, calculated lower and saturation (4.3 and 24 T, respectively) critical fields for 2 are consistent with experimental measurements, and magnetization data at very low temperatures indeed suggest the presence of quantum effects. Further, the computational study of short- and long-range spin ordering indicates that a 2D-to-3D crossover might be feasible at lower temperatures. Analysis of the Boltzmann population corroborates the presence of accessible triplet states above the singlet ground state enabling the aforementioned 2D-to-3D crossover.
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Affiliation(s)
- Jeffrey C Monroe
- Carlson School of Chemistry and Biochemistry, Clark University, 950 Main Street, Worcester, MA 01610, USA.
| | - M Angels Carvajal
- Dept. Ciència de Materials i Química Física, & IQCTUB, Universitat de Barcelona, Martí i Franquès 1, Barcelona, E-08028, Spain
| | - Christopher P Landee
- Department of Physics, Clark University 950 Main Street, Worcester, MA 01610, USA
| | - Mercè Deumal
- Dept. Ciència de Materials i Química Física, & IQCTUB, Universitat de Barcelona, Martí i Franquès 1, Barcelona, E-08028, Spain
| | - Mark M Turnbull
- Carlson School of Chemistry and Biochemistry, Clark University, 950 Main Street, Worcester, MA 01610, USA.
| | - Jan L Wikaira
- Department of Chemistry, University of Canterbury, 20 Kirkwood Ave, Upper Riccarton, Christchurch 8041, New Zealand
| | - Louise N Dawe
- Department of Chemistry and Biochemistry, Wilfrid Laurier University, Waterloo, Ontario, Canada
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3
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Blackmore WJA, Curley SPM, Williams RC, Vaidya S, Singleton J, Birnbaum S, Ozarowski A, Schlueter JA, Chen YS, Gillon B, Goukassov A, Kibalin I, Villa DY, Villa JA, Manson JL, Goddard PA. Magneto-structural Correlations in Ni 2+-Halide···Halide-Ni 2+ Chains. Inorg Chem 2021; 61:141-153. [PMID: 34939800 PMCID: PMC8753652 DOI: 10.1021/acs.inorgchem.1c02483] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
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We present the magnetic
properties of a new family of S = 1 molecule-based
magnets, NiF2(3,5-lut)4·2H2O
and NiX2(3,5-lut)4, where
X = HF2, Cl, Br, or I (lut = lutidine C7H9N). Upon creation of isolated Ni–X···X–Ni
and Ni–F–H–F···F–H–F–Ni
chains separated by bulky and nonbridging lutidine ligands, the effect
that halogen substitution has on the magnetic properties of transition-metal-ion
complexes can be investigated directly and in isolation from competing
processes such as Jahn–Teller distortions. We find that substitution
of the larger halide ions turns on increasingly strong antiferromagnetic
interactions between adjacent Ni2+ ions via a novel through-space
two-halide exchange. In this process, the X···X bond
lengths in the Br and I materials are more than double the van der
Waals radius of X yet can still mediate significant magnetic interactions.
We also find that a simple model based on elongation/compression of
the Ni2+ octahedra cannot explain the observed single-ion
anisotropy in mixed-ligand compounds. We offer an alternative that
takes into account the difference in the electronegativity of axial
and equatorial ligands. The magnetic
properties of well-separated Ni2+ chains are highly dependent
on the bridging halide ligands. By increasing
the size of the halide ions, we can decrease the single-ion anisotropy
such that the system moves from easy plane to easy axis. Through-space
magnetic interactions between adjacent Ni2+ ions are also
turned on as the larger halides are substituted into the exchange
pathway.
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Affiliation(s)
- William J A Blackmore
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K.,Department of Chemistry, School of Natural Sciences, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | | | | | - Shroya Vaidya
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K
| | - John Singleton
- National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Serena Birnbaum
- National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Andrew Ozarowski
- National High Magnetic Field Laboratory, Florida State University, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, United States
| | - John A Schlueter
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States.,Division of Materials Research, National Science Foundation, Arlington, Virginia 22230, United States
| | - Yu-Sheng Chen
- ChemMatCARS, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Beatrice Gillon
- Laboratoire Leon Brillouin (LLB), CEA-CNRS, CE Saclay, 91191 Gif-sur-Yvette Cedex, France
| | - Arsen Goukassov
- Laboratoire Leon Brillouin (LLB), CEA-CNRS, CE Saclay, 91191 Gif-sur-Yvette Cedex, France
| | - Iurii Kibalin
- Laboratoire Leon Brillouin (LLB), CEA-CNRS, CE Saclay, 91191 Gif-sur-Yvette Cedex, France
| | - Danielle Y Villa
- Department of Chemistry and Biochemistry, Eastern Washington State University, 226 Science, Cheney, Washington 99004, United States
| | - Jacqueline A Villa
- Department of Chemistry and Biochemistry, Eastern Washington State University, 226 Science, Cheney, Washington 99004, United States
| | - Jamie L Manson
- Department of Chemistry and Biochemistry, Eastern Washington State University, 226 Science, Cheney, Washington 99004, United States
| | - Paul A Goddard
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K
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4
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Singha DK, Islam SS, Das C, Ahmed KC N, Nath RC, Mahata P. Synthesis and Investigation of Magnetic Properties of Rod Shaped Micron Sized Ni
4
and Co
2
Ni
2
Cluster based MOFs. Z Anorg Allg Chem 2021. [DOI: 10.1002/zaac.202100225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Shams Sohel Islam
- School of Physics Indian Institute of Science Education and Research Thiruvananthapuram 695551 India
| | - Chhatan Das
- Department of Chemistry Jadavpur University Kolkata 700032 India
| | - Niyaz Ahmed KC
- School of Physics Indian Institute of Science Education and Research Thiruvananthapuram 695551 India
| | - Ramesh Chandra Nath
- School of Physics Indian Institute of Science Education and Research Thiruvananthapuram 695551 India
| | - Partha Mahata
- Department of Chemistry Jadavpur University Kolkata 700032 India
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5
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Kenny EP, Jacko AC, Powell BJ. Tight-Binding Approach to Pyrazine-Mediated Superexchange in Copper-Pyrazine Antiferromagnets. Inorg Chem 2021; 60:11907-11914. [PMID: 34310131 DOI: 10.1021/acs.inorgchem.1c00532] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We investigate the cause of spatial superexchange anisotropy in a family of copper-based, quasi-two-dimensional materials with very similar geometries. The compounds in this family differ mainly in their inter-layer separation but they have very different magnetic interactions, even within the basal plane. We use density functional theory and Wannier functions to parameterize two complimentary tight-binding models and show that the superexchange between the Cu2+ ions is dominated by a σ-mediated interaction between hybrid Cu-pyrazine orbitals centered on the copper atoms. We find no correlations between the strength of this exchange interaction and homologous geometric features across the compounds, such as Cu and pyrazine bond lengths and orientations of nearby counterions. We find that the pyrazine tilt angles do not affect the Cu-pyrazine-Cu exchange because the lowest unoccupied molecular orbital on pyrazine is at a very high energy (relative to the frontier orbitals, which are Cu-based). We conclude that careful control of the entire crystal structure, including non-homologous geometric features such as the inter-layer organic ligands, is vital for engineering magnetic properties.
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Affiliation(s)
- E P Kenny
- School of Mathematics and Physics, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - A C Jacko
- School of Mathematics and Physics, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - B J Powell
- School of Mathematics and Physics, The University of Queensland, St Lucia, Queensland 4072, Australia
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6
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Jacko AC, Powell BJ. Quasi-one dimensional magnetic interactions in the three-dimensional hyper-honeycomb framework [(C 2H 5) 3NH] 2Cu 2(C 2O 4) 3. Phys Chem Chem Phys 2021; 23:5012-5019. [PMID: 33624644 DOI: 10.1039/d0cp05999d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Cu(ii) ions in [(C2H5)3NH]2Cu2(C2O4)3 form a hyperhoneycomb lattice and show no indication of long-range magnetic order down to 60 mK. It has therefore been suggested that [(C2H5)3NH]2Cu2(C2O4)3 is a three dimensional quantum spin liquid. We construct a tight-binding model of [(C2H5)3NH]2Cu2(C2O4)3 from Wannier orbital overlaps. Including interactions within the Jahn-Teller distorted Cu-centered eg Wannier orbitals leads to a highly anisotropic effective Heisenberg model. We show that this anisotropy arrises from interference between different superexchange pathways. This demonstrates that when two (or more) orbitals contribute to the localised spin superexchange can be significantly richer than in the textbook single orbital case. The hyper-honeycomb lattice contains two symmetry distinct sublattices of Cu atoms arranged in coupled chains. We show that one sublattice is strongly dimerized, the other forms isotropic antiferromagnetic chains. Integrating out the strongest (intradimer) exchange interactions leaves extremely weakly coupled Heisenberg chains.
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Affiliation(s)
- Anthony C Jacko
- School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland 4072, Australia.
| | - Benjamin J Powell
- School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland 4072, Australia.
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7
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Landee CP, Kirkman-Davis E, Polson MIJ, Turnbull MM, Wikaira JL. Synthesis, structure and magnetic properties of catena-diaqua-bis(pyridine-N-oxide)(μ-pyrazine)copper(II) perchlorate and the monomeric structure tetrakis(pyridine-N-oxide)copper(II) perchlorate. J COORD CHEM 2020. [DOI: 10.1080/00958972.2020.1856825] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
| | - Emma Kirkman-Davis
- Carlson School of Chemistry and Biochemistry, Clark University, Worcester, MA, USA
| | - Matthew I. J. Polson
- School of Physical and Chemical Sciences, University of Canterbury, Christchurch, New Zealand
| | - Mark M. Turnbull
- Carlson School of Chemistry and Biochemistry, Clark University, Worcester, MA, USA
| | - Jan L. Wikaira
- School of Physical and Chemical Sciences, University of Canterbury, Christchurch, New Zealand
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8
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Kirkman-Davis E, Witkos FE, Selmani V, Monroe JC, Landee CP, Turnbull MM, Dawe LN, Polson MIJ, Wikaira JL. Pyrazine-bridged Cu(ii) chains: diaquabis(n-methyl-2-pyridone)copper(ii) perchlorate complexes. Dalton Trans 2020; 49:13693-13703. [PMID: 32996511 DOI: 10.1039/d0dt02716b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A family of pyrazine-bridged, linear chain complexes of Cu(ii) of the formula [CuL2(H2O)2(pz)](ClO4)2 [pz = pyrazine; L = n-methyl-2(1H)-pyridone, n = 3 (1), 5 (2), and 6 (3)] has been prepared. Single-crystal X-ray diffraction shows six-coordinate, pyrazine-bridged chains with trans-pairs of ancillary ligands. The substituted pyridine molecules exist in their pyridone tautomers and are coordinated through the carbonyl oxygen atom. The structure is stabilized by intramolecular hydrogen bonds between the pyridone and water molecule, and via hydrogen bonds between the water molecules and perchlorate ions. 2 undergoes a crystallographic phase transition between C2/c (high temperature phase) and P1[combining macron] (low temperature phase). Powder EPR spectra reveal that all complexes are rhombic, although differences between gx and gy can only be seen clearly at Q-band. Variable temperature magnetic susceptibility data show antiferromagnetic interactions and the data were fit to the uniform chain model yielding J/kB = -9.8, -9.2 and -11 K for 1-3 respectively. Attempts to model an interchain interaction strength indicate that the chains are very well isolated.
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Affiliation(s)
- Emma Kirkman-Davis
- Carlson School of Chemistry and Biochemistry, Clark University, 950 Main Street, Worcester, MA 01610, USA.
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9
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Scatena R, Montisci F, Lanza A, Casati NPM, Macchi P. Magnetic Network on Demand: Pressure Tunes Square Lattice Coordination Polymers Based on {[Cu(pyrazine) 2] 2+} n. Inorg Chem 2020; 59:10091-10098. [PMID: 32615765 PMCID: PMC8008383 DOI: 10.1021/acs.inorgchem.0c01229] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report the pressure-induced structural and magnetic changes in [CuCl(pyz)2](BF4) (pyz = pyrazine) and [CuBr(pyz)2](BF4), two members of a family of three-dimensional coordination polymers based on square mesh {[Cu(pyz)2]2+}n layers. High-pressure X-ray diffraction and density functional theory calculations have been used to investigate the structure-magnetic property relationship. Although structurally robust and almost undeformed within a large pressure range, the {[Cu(pyz)2]2+}n network can be electronically modified by adjusting the interaction of the apical linkers interconnecting the layers, which has strong implications for the magnetic properties. It is then demonstrated that the degree of covalent character of the apical interaction explains the difference in magnetic exchange between the two species. We have also investigated the mechanical deformation of the network induced by nonhydrostatic compression that affects the structure depending on the crystal orientation. The obtained results suggest the existence of "Jahn-Teller frustration" triggered at the highest hydrostatic pressure limit.
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Affiliation(s)
- Rebecca Scatena
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
| | - Fabio Montisci
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
| | - Arianna Lanza
- Center for Nanotechnology Innovation @NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro 12, 56127 Pisa, Italy
| | - Nicola P M Casati
- Paul Scherrer Institute, Laboratory for Synchrotron Radiation Condensed Matter, Forschungsstrasse 111, 5232 Villigen, Switzerland
| | - Piero Macchi
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland.,Department of Chemistry, Materials and Chemical Engineering, Polytechnic of Milan, via Mancinelli 7, 20131 Milan, Italy
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10
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Monroe JC, Landee CP, Turnbull MM, Wikaira JL. Well-isolated pyrazine-bridged copper(II) chains: synthesis and magneto-structural analysis. J COORD CHEM 2020. [DOI: 10.1080/00958972.2020.1789972] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Jeffrey C. Monroe
- Carlson School of Chemistry and Biochemistry, Clark University, Worcester, MA, USA
| | | | - Mark M. Turnbull
- Carlson School of Chemistry and Biochemistry, Clark University, Worcester, MA, USA
| | - Jan L. Wikaira
- School of Physical and Chemical Sciences, University of Canterbury, Christchurch, New Zealand
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11
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Monroe JC, Landee CP, Turnbull MM, Polson M, Wikaira JL. Halide-bridged Cu(pyrazine)2 perchlorate layers: Structure and magnetism. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.07.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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12
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Kenny EP, Jacko AC, Powell BJ. Mechanomagnetics in Elastic Crystals: Insights from [Cu(acac) 2 ]. Angew Chem Int Ed Engl 2019; 58:15082-15088. [PMID: 31452321 DOI: 10.1002/anie.201907889] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Indexed: 11/11/2022]
Abstract
We predict that the magnetic properties of [Cu(acac)2 ], an elastically flexible crystal, change drastically when the crystal is bent. It is found that unbent [Cu(acac)2 ] is an almost perfect Tomonaga-Luttinger liquid. Broken-symmetry density-functional calculations reveal that the magnetic exchange interactions along the chains are an order of magnitude larger than the interchain exchange. The geometrically frustrated interchain interactions cannot magnetically order the material at any experimentally accessible temperature. The ordering temperature (TN ), calculated from the chain-random-phase approximation, increases by 24 orders of magnitude when the material is bent. We demonstrate that geometric frustration both suppresses TN and enhances the sensitivity of TN to bending. In [Cu(acac)2 ], TN is extremely sensitive to bending but remains too low for practical applications, even when bent. Partially frustrated materials could achieve the balance of high TN and good sensitivity to bending required for practical applications of mechanomagnetic elastic crystals.
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Affiliation(s)
- Elise P Kenny
- School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland, Australia
| | - Anthony C Jacko
- School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland, Australia
| | - Ben J Powell
- School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland, Australia
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13
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Kenny EP, Jacko AC, Powell BJ. Mechanomagnetics in Elastic Crystals: Insights from [Cu(acac)
2
]. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201907889] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Elise P. Kenny
- School of Mathematics and Physics The University of Queensland Brisbane Queensland Australia
| | - Anthony C. Jacko
- School of Mathematics and Physics The University of Queensland Brisbane Queensland Australia
| | - Ben J. Powell
- School of Mathematics and Physics The University of Queensland Brisbane Queensland Australia
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14
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Hearne N, Turnbull MM, Landee CP, van der Merwe EM, Rademeyer M. Halide-bi-bridged polymers of amide substituted pyridines and -pyrazines: polymorphism, structures, thermal stability and magnetism. CrystEngComm 2019. [DOI: 10.1039/c9ce00071b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The structural trends, polymorphic behaviour, magnetic properties and thermal stability of a family of halide-bi-bridged polymers of CuX2 and amide-substituted pyridines and -pyrazines are reported, and compared with related compounds in the literature.
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Affiliation(s)
- Neil Hearne
- Department of Chemistry
- University of Pretoria
- Pretoria
- South Africa
| | - Mark M. Turnbull
- Carlson School of Chemistry and Biochemistry
- Clark University
- Worcester
- USA
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15
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Wehinger B, Fiolka C, Lanza A, Scatena R, Kubus M, Grockowiak A, Coniglio WA, Graf D, Skoulatos M, Chen JH, Gukelberger J, Casati N, Zaharko O, Macchi P, Krämer KW, Tozer S, Mudry C, Normand B, Rüegg C. Giant Pressure Dependence and Dimensionality Switching in a Metal-Organic Quantum Antiferromagnet. PHYSICAL REVIEW LETTERS 2018; 121:117201. [PMID: 30265101 DOI: 10.1103/physrevlett.121.117201] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Indexed: 06/08/2023]
Abstract
We report an extraordinary pressure dependence of the magnetic interactions in the metal-organic system [CuF_{2}(H_{2}O)_{2}]_{2}pyrazine. At zero pressure, this material realizes a quasi-two-dimensional spin-1/2 square-lattice Heisenberg antiferromagnet. By high-pressure, high-field susceptibility measurements we show that the dominant exchange parameter is reduced continuously by a factor of 2 on compression. Above 18 kbar, a phase transition occurs, inducing an orbital re-ordering that switches the dimensionality, transforming the quasi-two-dimensional lattice into weakly coupled chains. We explain the microscopic mechanisms for both phenomena by combining detailed x-ray and neutron diffraction studies with quantitative modeling using spin-polarized density functional theory.
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Affiliation(s)
- B Wehinger
- Department of Quantum Matter Physics, University of Geneva, 24, Quai Ernest Ansermet, CH-1211 Genève, Switzerland
- Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland
| | - C Fiolka
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - A Lanza
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - R Scatena
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - M Kubus
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - A Grockowiak
- National High Magnetic Field Laboratory, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, USA
| | - W A Coniglio
- National High Magnetic Field Laboratory, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, USA
| | - D Graf
- National High Magnetic Field Laboratory, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, USA
| | - M Skoulatos
- Heinz-Maier-Leibnitz Zentrum and Physics Department, Technische Universität München, Lichtenbergstrasse 1, 85748 Garching, Germany
| | - J-H Chen
- Condensed Matter Theory Group, Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland
- Theoretical Physics, ETH Zürich, CH-8093 Zürich, Switzerland
| | - J Gukelberger
- Theoretical Physics, ETH Zürich, CH-8093 Zürich, Switzerland
- Département de Physique and Institut Quantique, Université de Sherbrooke, Sherbrooke, Québec, J1K 2R1, Canada
| | - N Casati
- Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland
| | - O Zaharko
- Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland
| | - P Macchi
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - K W Krämer
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - S Tozer
- National High Magnetic Field Laboratory, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, USA
| | - C Mudry
- Condensed Matter Theory Group, Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland
| | - B Normand
- Neutrons and Muons Research Division, Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland
| | - Ch Rüegg
- Department of Quantum Matter Physics, University of Geneva, 24, Quai Ernest Ansermet, CH-1211 Genève, Switzerland
- Neutrons and Muons Research Division, Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland
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16
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Mergenthaler M, Liu J, Le Roy JJ, Ares N, Thompson AL, Bogani L, Luis F, Blundell SJ, Lancaster T, Ardavan A, Briggs GAD, Leek PJ, Laird EA. Strong Coupling of Microwave Photons to Antiferromagnetic Fluctuations in an Organic Magnet. PHYSICAL REVIEW LETTERS 2017; 119:147701. [PMID: 29053322 DOI: 10.1103/physrevlett.119.147701] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Indexed: 06/07/2023]
Abstract
Coupling between a crystal of di(phenyl)-(2,4,6-trinitrophenyl)iminoazanium radicals and a superconducting microwave resonator is investigated in a circuit quantum electrodynamics (circuit QED) architecture. The crystal exhibits paramagnetic behavior above 4 K, with antiferromagnetic correlations appearing below this temperature, and we demonstrate strong coupling at base temperature. The magnetic resonance acquires a field angle dependence as the crystal is cooled down, indicating anisotropy of the exchange interactions. These results show that multispin modes in organic crystals are suitable for circuit QED, offering a platform for their coherent manipulation. They also utilize the circuit QED architecture as a way to probe spin correlations at low temperature.
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Affiliation(s)
- Matthias Mergenthaler
- Department of Materials, University of Oxford, Oxford OX1 3PH, United Kingdom
- Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
| | - Junjie Liu
- Department of Materials, University of Oxford, Oxford OX1 3PH, United Kingdom
| | - Jennifer J Le Roy
- Department of Materials, University of Oxford, Oxford OX1 3PH, United Kingdom
| | - Natalia Ares
- Department of Materials, University of Oxford, Oxford OX1 3PH, United Kingdom
| | - Amber L Thompson
- Chemical Crystallography, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, United Kingdom
| | - Lapo Bogani
- Department of Materials, University of Oxford, Oxford OX1 3PH, United Kingdom
| | - Fernando Luis
- Instituto de Ciencia de Materiales de Aragón (CSIC-U. de Zaragoza), 50009 Zaragoza, Spain
| | - Stephen J Blundell
- Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
| | - Tom Lancaster
- Durham University, Centre for Materials Physics, Department of Physics, Durham DH1 3LE, United Kingdom
| | - Arzhang Ardavan
- Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
| | - G Andrew D Briggs
- Department of Materials, University of Oxford, Oxford OX1 3PH, United Kingdom
| | - Peter J Leek
- Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
| | - Edward A Laird
- Department of Materials, University of Oxford, Oxford OX1 3PH, United Kingdom
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17
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Paduan-Filho A, Vieira AP, Ramon JGA, Freitas RS. Crossover from one- to three-dimensional behavior in the S = 1/2 Heisenberg antiferromagnet Cu(N 2H 5) 2(SO 4) 2. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:506004. [PMID: 27792667 DOI: 10.1088/0953-8984/28/50/506004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
From experimental and theoretical analyses of magnetic and specific-heat properties, we present the complete magnetic phase diagram of the quasi-1D antiferromagnet Cu(N2H5)2(SO4)2. On cooling and at zero magnetic field this compound enters a 1D regime with short-range magnetic correlations, marked by a broad maximum in the specific heat and magnetic susceptibility at [Formula: see text] K, followed by a tridimensional antiferromagnetically ordered phase below [Formula: see text] K induced by small interchain couplings. The intermediate-temperature 1D regime can be modeled using exact quantum-transfer-matrix calculations, which offer a compatible description of the nonmonotonic behavior of [Formula: see text] as a function of the magnetic field, giving [Formula: see text] K for the intrachain exchange parameter. The analysis of magnetic specific-heat and susceptibility data at low temperature indicates that the interchain exchange couplings are an order of magnitude smaller than the coupling inside the chains.
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Affiliation(s)
- A Paduan-Filho
- Instituto de Física, Universidade de São Paulo, 05314-970 São Paulo, Brazil
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18
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Spin-orbit coupled molecular quantum magnetism realized in inorganic solid. Nat Commun 2016; 7:12912. [PMID: 27650796 PMCID: PMC5035996 DOI: 10.1038/ncomms12912] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2016] [Accepted: 08/15/2016] [Indexed: 11/08/2022] Open
Abstract
Molecular quantum magnetism involving an isolated spin state is of particular interest due to the characteristic quantum phenomena underlying spin qubits or molecular spintronics for quantum information devices, as demonstrated in magnetic metal-organic molecular systems, the so-called molecular magnets. Here we report the molecular quantum magnetism realized in an inorganic solid Ba3Yb2Zn5O11 with spin-orbit coupled pseudospin-½ Yb(3+) ions. The magnetization represents the magnetic quantum values of an isolated Yb4 tetrahedron with a total (pseudo)spin 0, 1 and 2. Inelastic neutron scattering results reveal that a large Dzyaloshinsky-Moriya interaction originating from strong spin-orbit coupling of Yb 4f is a key ingredient to explain magnetic excitations of the molecular magnet states. The Dzyaloshinsky-Moriya interaction allows a non-adiabatic quantum transition between avoided crossing energy levels, and also results in unexpected magnetic behaviours in conventional molecular magnets.
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19
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Liu J, Goddard PA, Singleton J, Brambleby J, Foronda F, Möller JS, Kohama Y, Ghannadzadeh S, Ardavan A, Blundell SJ, Lancaster T, Xiao F, Williams RC, Pratt FL, Baker PJ, Wierschem K, Lapidus SH, Stone KH, Stephens PW, Bendix J, Woods TJ, Carreiro KE, Tran HE, Villa CJ, Manson JL. Antiferromagnetism in a Family of S = 1 Square Lattice Coordination Polymers NiX2(pyz)2 (X = Cl, Br, I, NCS; pyz = Pyrazine). Inorg Chem 2016; 55:3515-29. [PMID: 27002487 DOI: 10.1021/acs.inorgchem.5b02991] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The crystal structures of NiX2(pyz)2 (X = Cl (1), Br (2), I (3), and NCS (4)) were determined by synchrotron X-ray powder diffraction. All four compounds consist of two-dimensional (2D) square arrays self-assembled from octahedral NiN4X2 units that are bridged by pyz ligands. The 2D layered motifs displayed by 1-4 are relevant to bifluoride-bridged [Ni(HF2)(pyz)2]EF6 (E = P, Sb), which also possess the same 2D layers. In contrast, terminal X ligands occupy axial positions in 1-4 and cause a staggered packing of adjacent layers. Long-range antiferromagnetic (AFM) order occurs below 1.5 (Cl), 1.9 (Br and NCS), and 2.5 K (I) as determined by heat capacity and muon-spin relaxation. The single-ion anisotropy and g factor of 2, 3, and 4 were measured by electron-spin resonance with no evidence for zero-field splitting (ZFS) being observed. The magnetism of 1-4 spans the spectrum from quasi-two-dimensional (2D) to three-dimensional (3D) antiferromagnetism. Nearly identical results and thermodynamic features were obtained for 2 and 4 as shown by pulsed-field magnetization, magnetic susceptibility, as well as their Néel temperatures. Magnetization curves for 2 and 4 calculated by quantum Monte Carlo simulation also show excellent agreement with the pulsed-field data. Compound 3 is characterized as a 3D AFM with the interlayer interaction (J⊥) being slightly stronger than the intralayer interaction along Ni-pyz-Ni segments (J(pyz)) within the two-dimensional [Ni(pyz)2](2+) square planes. Regardless of X, J(pyz) is similar for the four compounds and is roughly 1 K.
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Affiliation(s)
- Junjie Liu
- Department of Physics, Clarendon Laboratory, University of Oxford , Parks Road, Oxford OX1 3PU, United Kingdom
| | - Paul A Goddard
- Department of Physics, University of Warwick , Gibbet Hill Road, Coventry, CV4 7AL, United Kingdom
| | - John Singleton
- National High Magnetic Field Laboratory, Los Alamos National Laboratory , MS-E536, Los Alamos, New Mexico 87545, United States
| | - Jamie Brambleby
- Department of Physics, University of Warwick , Gibbet Hill Road, Coventry, CV4 7AL, United Kingdom
| | - Francesca Foronda
- Department of Physics, Clarendon Laboratory, University of Oxford , Parks Road, Oxford OX1 3PU, United Kingdom
| | - Johannes S Möller
- Department of Physics, Clarendon Laboratory, University of Oxford , Parks Road, Oxford OX1 3PU, United Kingdom
| | - Yoshimitsu Kohama
- National High Magnetic Field Laboratory, Los Alamos National Laboratory , MS-E536, Los Alamos, New Mexico 87545, United States
| | - Saman Ghannadzadeh
- Department of Physics, Clarendon Laboratory, University of Oxford , Parks Road, Oxford OX1 3PU, United Kingdom
| | - Arzhang Ardavan
- Department of Physics, Clarendon Laboratory, University of Oxford , Parks Road, Oxford OX1 3PU, United Kingdom
| | - Stephen J Blundell
- Department of Physics, Clarendon Laboratory, University of Oxford , Parks Road, Oxford OX1 3PU, United Kingdom
| | - Tom Lancaster
- Centre for Materials Physics, Durham University , South Road, Durham DH1 3LE, United Kingdom
| | - Fan Xiao
- Centre for Materials Physics, Durham University , South Road, Durham DH1 3LE, United Kingdom
| | - Robert C Williams
- Centre for Materials Physics, Durham University , South Road, Durham DH1 3LE, United Kingdom
| | - Francis L Pratt
- ISIS Pulsed Muon Facility, STFC Rutherford Appleton Laboratory , Chilton, Didcot, OX11 0QX, United Kingdom
| | - Peter J Baker
- ISIS Pulsed Muon Facility, STFC Rutherford Appleton Laboratory , Chilton, Didcot, OX11 0QX, United Kingdom
| | - Keola Wierschem
- School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore 637371, Singapore
| | - Saul H Lapidus
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory , Lemont, Illinois 60439, United States
| | - Kevin H Stone
- Department of Physics and Astronomy, State University of New York , Stony Brook, New York 11794, United States
| | - Peter W Stephens
- Department of Physics and Astronomy, State University of New York , Stony Brook, New York 11794, United States
| | - Jesper Bendix
- Department of Chemistry, University of Copenhagen , Copenhagen DK-2100, Denmark
| | - Toby J Woods
- Department of Chemistry and Biochemistry, Eastern Washington University , Cheney, Washington 99004, United States
| | - Kimberly E Carreiro
- Department of Chemistry and Biochemistry, Eastern Washington University , Cheney, Washington 99004, United States
| | - Hope E Tran
- Department of Chemistry and Biochemistry, Eastern Washington University , Cheney, Washington 99004, United States
| | - Cecelia J Villa
- Department of Chemistry and Biochemistry, Eastern Washington University , Cheney, Washington 99004, United States
| | - Jamie L Manson
- Department of Chemistry and Biochemistry, Eastern Washington University , Cheney, Washington 99004, United States
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20
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Manson JL, Huang QZ, Brown CM, Lynn JW, Stone MB, Singleton J, Xiao F. Magnetic Structure and Exchange Interactions in Quasi-One-Dimensional MnCl2(urea)2. Inorg Chem 2015; 54:11897-905. [PMID: 26645988 PMCID: PMC4784262 DOI: 10.1021/acs.inorgchem.5b02162] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
MnCl2(urea)2 is a new linear chain coordination polymer that exhibits slightly counter-rotated Mn2Cl2 rhomboids along the chain-axis. The material crystallizes in the noncentrosymmetric orthorhombic space group Iba2, with each Mn(II) ion equatorially surrounded by four Cl(-) that lead to bibridged ribbons. Urea ligands coordinate via O atoms in the axial positions. Hydrogen bonds of the Cl···H-N and O···H-N type link the chains into a quasi-3D network. Magnetic susceptibility data reveal a broad maximum at 9 K that is consistent with short-range magnetic order. Pulsed-field magnetization measurements conducted at 0.6 K show that a fully polarized magnetic state is achieved at Bsat = 19.6 T with another field-induced phase transition occurring at 2.8 T. Zero-field neutron diffraction studies made on a powdered sample of MnCl2(urea)2 reveal that long-range magnetic order occurs below TN = 3.2(1) K. Additional Bragg peaks due to antiferromagnetic (AFM) ordering can be indexed according to the Ib'a2' magnetic space group and propagation vector τ = [0, 0, 0]. Rietveld profile analysis of these data revealed a Néel-type collinear ordering of Mn(II) ions with an ordered magnetic moment of 4.06(6) μB (5 μB is expected for isotropic S = (5)/2) oriented along the b-axis, i.e., perpendicular to the chain-axis that runs along the c-direction. Owing to the potential for spatial exchange anisotropy and the pitfalls in modeling bulk magnetic data, we analyzed inelastic neutron scattering data to retrieve the exchange constants: Jc = 2.22 K (intrachain), Ja = -0.10 K (interchain), and D = -0.14 K with J > 0 assigned to AFM coupling. This J configuration is most unusual and contrasts the more commonly observed AFM interchain coupling of 1D chains.
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Affiliation(s)
- Jamie L. Manson
- Department of Chemistry and Biochemistry, Eastern Washington University, Cheney, WA 99004 USA
| | - Qing-zhen Huang
- NISTCenter for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD 20899 USA
| | - Craig M. Brown
- NISTCenter for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD 20899 USA
- Department of Chemical and Biochemical Engineering, University of Delaware, Newark, DE 19716 USA
| | - Jeffrey W. Lynn
- NISTCenter for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD 20899 USA
| | - Matthew B. Stone
- Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, TN 37830 USA
| | - John Singleton
- National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, NM 87545 USA
| | - Fan Xiao
- Center for Materials Physics, Durham University, Durham DH1 3LE UK
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21
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Manson JL, Brown CM, Huang Q, Schlueter JA, Lancaster T, Blundell SJ, Singleton J, Lynn JW, Pratt FL. Mn(dca)2(o-phen) {dca=dicyanamide; o-phen=1,10-phenanthroline}: Long-range magnetic order in a low-dimensional Mn-dca polymer. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.07.087] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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22
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Lapidus SH, Manson JL, Park H, Clement AJ, Ghannadzadeh S, Goddard P, Lancaster T, Möller JS, Blundell SJ, Telling MTF, Kang J, Whangbo MH, Schlueter JA. Antiferromagnetic ordering through a hydrogen-bonded network in the molecular solid CuF2(H2O)2(3-chloropyridine). Chem Commun (Camb) 2013. [PMID: 23203152 DOI: 10.1039/c2cc37444g] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Saul H Lapidus
- Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA
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