1
|
Baran S, Deptuch A, Hoser A, Penc B, Przewoźnik J, Szytuła A. Crystal and magnetic structures of R 2Ni 2In compounds (R = Tb and Ho). ACTA CRYSTALLOGRAPHICA SECTION B, STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS 2023; 79:346-353. [PMID: 37578186 DOI: 10.1107/s2052520623006315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 07/20/2023] [Indexed: 08/15/2023]
Abstract
Crystal and magnetic structures of R2Ni2In (R = Tb and Ho) have been studied using powder neutron diffraction at low temperatures. The compounds crystallize as orthorhombic crystal structures of the Mn2AlB2 type. At low temperatures, the magnetic moments localized solely on the rare earth atoms form antiferromagnetic structures. The Tb magnetic moments, equal to 8.8 (4) μB and parallel to the c axis, form a collinear magnetic structure described by the propagation vector k = [½ , ½ , ½]. This magnetic structure is stable up to the Néel temperature TN = 40 K. For Ho2Ni2In a complex, temperature-dependent magnetic structure is detected. In the temperature range 6.1-8.6 K, an incommensurate sinusoidal magnetic structure, described by the propagation vector k1 = [0.24, 1, 0.52] is observed, while in the temperature interval 2.2-2.5 K a square-modulated magnetic structure, related to k2 = [0.17,{{5} \over {6}},{{1} \over {2}}] (the component along the a axis slightly differs from the commensurate value) and its third harmonics 3k2 = [0.50,{{5} \over {2}},{{3} \over {2}}] is found. At 3.1-3.7 K as well as below 2 K, a coexistence of both detected magnetic structures is observed. The Ho magnetic moments remain parallel to the c axis in both the sine- and square-modulated magnetic structures. The low-temperature heat capacity data confirm a first-order transition near 3 K.
Collapse
Affiliation(s)
- Stanisław Baran
- Jagiellonian University, Faculty of Physics, Astronomy and Applied Computer Science, M. Smoluchowski Institute of Physics, prof. Stanisława Łojasiewicza 11, PL-30-348 Kraków, Poland
| | - Aleksandra Deptuch
- Institute of Nuclear Physics Polish Academy of Sciences, Radzikowskiego 152, PL-31-342 Kraków, Poland
| | - Andreas Hoser
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner Platz 1, D-14109, Berlin, Germany
| | - Bogusław Penc
- Jagiellonian University, Faculty of Physics, Astronomy and Applied Computer Science, M. Smoluchowski Institute of Physics, prof. Stanisława Łojasiewicza 11, PL-30-348 Kraków, Poland
| | - Janusz Przewoźnik
- AGH University of Krakow, Faculty of Physics and Applied Computer Science, Department of Solid State Physics, Al. Mickiewicza 30, PL-30-059 Kraków, Poland
| | - Andrzej Szytuła
- Jagiellonian University, Faculty of Physics, Astronomy and Applied Computer Science, M. Smoluchowski Institute of Physics, prof. Stanisława Łojasiewicza 11, PL-30-348 Kraków, Poland
| |
Collapse
|
2
|
Gaudet J, Yang HY, Baidya S, Lu B, Xu G, Zhao Y, Rodriguez-Rivera JA, Hoffmann CM, Graf DE, Torchinsky DH, Nikolić P, Vanderbilt D, Tafti F, Broholm CL. Weyl-mediated helical magnetism in NdAlSi. NATURE MATERIALS 2021; 20:1650-1656. [PMID: 34413490 DOI: 10.1038/s41563-021-01062-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 06/23/2021] [Indexed: 06/13/2023]
Abstract
Emergent relativistic quasiparticles in Weyl semimetals are the source of exotic electronic properties such as surface Fermi arcs, the anomalous Hall effect and negative magnetoresistance, all observed in real materials. Whereas these phenomena highlight the effect of Weyl fermions on the electronic transport properties, less is known about what collective phenomena they may support. Here, we report a Weyl semimetal, NdAlSi, that offers an example. Using neutron diffraction, we found a long-wavelength helical magnetic order in NdAlSi, the periodicity of which is linked to the nesting vector between two topologically non-trivial Fermi pockets, which we characterize using density functional theory and quantum oscillation measurements. We further show the chiral transverse component of the spin structure is promoted by bond-oriented Dzyaloshinskii-Moriya interactions associated with Weyl exchange processes. Our work provides a rare example of Weyl fermions driving collective magnetism.
Collapse
Affiliation(s)
- Jonathan Gaudet
- Department of Physics and Astronomy and Institute for Quantum Matter, The Johns Hopkins University, Baltimore, MD, USA.
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD, USA.
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, USA.
| | - Hung-Yu Yang
- Department of Physics, Boston College, Chestnut Hill, MA, USA
| | - Santu Baidya
- Department of Physics and Astronomy, Rutgers University, Piscataway, NJ, USA
| | - Baozhu Lu
- Department of Physics, Temple University, Philadelphia, PA, USA
| | - Guangyong Xu
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD, USA
| | - Yang Zhao
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD, USA
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, USA
| | - Jose A Rodriguez-Rivera
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD, USA
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, USA
| | | | - David E Graf
- National High Magnetic Field Laboratory, Tallahassee, FL, USA
| | | | - Predrag Nikolić
- Department of Physics and Astronomy and Institute for Quantum Matter, The Johns Hopkins University, Baltimore, MD, USA
- Department of Physics and Astronomy, George Mason University, Fairfax, VA, USA
| | - David Vanderbilt
- Department of Physics and Astronomy, Rutgers University, Piscataway, NJ, USA
| | - Fazel Tafti
- Department of Physics, Boston College, Chestnut Hill, MA, USA
| | - Collin L Broholm
- Department of Physics and Astronomy and Institute for Quantum Matter, The Johns Hopkins University, Baltimore, MD, USA
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD, USA
| |
Collapse
|
3
|
Amorese A, Sundermann M, Leedahl B, Marino A, Takegami D, Gretarsson H, Gloskovskii A, Schlueter C, Haverkort MW, Huang Y, Szlawska M, Kaczorowski D, Ran S, Maple MB, Bauer ED, Leithe-Jasper A, Hansmann P, Thalmeier P, Tjeng LH, Severing A. From antiferromagnetic and hidden order to Pauli paramagnetism in U M 2Si 2 compounds with 5 f electron duality. Proc Natl Acad Sci U S A 2020; 117:30220-30227. [PMID: 33203673 PMCID: PMC7720184 DOI: 10.1073/pnas.2005701117] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Using inelastic X-ray scattering beyond the dipole limit and hard X-ray photoelectron spectroscopy we establish the dual nature of the U [Formula: see text] electrons in U[Formula: see text] (M = Pd, Ni, Ru, Fe), regardless of their degree of delocalization. We have observed that the compounds have in common a local atomic-like state that is well described by the U [Formula: see text] configuration with the [Formula: see text] and [Formula: see text] quasi-doublet symmetry. The amount of the U 5[Formula: see text] configuration, however, varies considerably across the U[Formula: see text] series, indicating an increase of U 5f itineracy in going from M = Pd to Ni to Ru and to the Fe compound. The identified electronic states explain the formation of the very large ordered magnetic moments in [Formula: see text] and [Formula: see text], the availability of orbital degrees of freedom needed for the hidden order in [Formula: see text] to occur, as well as the appearance of Pauli paramagnetism in [Formula: see text] A unified and systematic picture of the U[Formula: see text] compounds may now be drawn, thereby providing suggestions for additional experiments to induce hidden order and/or superconductivity in U compounds with the tetragonal body-centered [Formula: see text] structure.
Collapse
Affiliation(s)
- Andrea Amorese
- Institute of Physics II, University of Cologne, 50937 Cologne, Germany
- Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
| | - Martin Sundermann
- Institute of Physics II, University of Cologne, 50937 Cologne, Germany
- Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
| | - Brett Leedahl
- Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
| | - Andrea Marino
- Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
| | - Daisuke Takegami
- Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
| | - Hlynur Gretarsson
- Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
- Positron-Elektron-Tandem-Ring-Anlage III (PETRA III), Deutsches Elektronen-Synchrotron, 22607 Hamburg, Germany
| | - Andrei Gloskovskii
- Positron-Elektron-Tandem-Ring-Anlage III (PETRA III), Deutsches Elektronen-Synchrotron, 22607 Hamburg, Germany
| | - Christoph Schlueter
- Positron-Elektron-Tandem-Ring-Anlage III (PETRA III), Deutsches Elektronen-Synchrotron, 22607 Hamburg, Germany
| | - Maurits W Haverkort
- Institute for Theoretical Physics, Heidelberg University, 69120 Heidelberg, Germany
| | - Yingkai Huang
- van der Waals-Zeeman Institute, University of Amsterdam, 1098 XH Amsterdam, The Netherlands
| | - Maria Szlawska
- Institute of Low Temperature & Structure Research, Polish Academy of Science, 50-950 Wroclaw, Poland
| | - Dariusz Kaczorowski
- Institute of Low Temperature & Structure Research, Polish Academy of Science, 50-950 Wroclaw, Poland
| | - Sheng Ran
- Department of Physics, University of California San Diego, La Jolla, CA 92093
| | - M Brian Maple
- Department of Physics, University of California San Diego, La Jolla, CA 92093
| | - Eric D Bauer
- MPA-Q, Los Alamos National Laboratory, Los Alamos, NM 87545
| | | | - Philipp Hansmann
- Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
- Department of Physics, University of Erlangen-Nuremberg, 91058 Erlangen, Germany
| | - Peter Thalmeier
- Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
| | - Liu Hao Tjeng
- Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
| | - Andrea Severing
- Institute of Physics II, University of Cologne, 50937 Cologne, Germany;
- Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
| |
Collapse
|
4
|
Kuwahara K, Yoshii S, Nojiri H, Aoki D, Knafo W, Duc F, Fabrèges X, Scheerer GW, Frings P, Rikken GLJA, Bourdarot F, Regnault LP, Flouquet J. Magnetic structure of phase II in U(Ru(0.96)Rh(0.04))2Si2 determined by neutron diffraction under pulsed high magnetic fields. PHYSICAL REVIEW LETTERS 2013; 110:216406. [PMID: 23745903 DOI: 10.1103/physrevlett.110.216406] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Revised: 04/23/2013] [Indexed: 06/02/2023]
Abstract
We report neutron diffraction measurements on U(Ru(0.96)Rh(0.04))(2)Si(2) single crystal under pulsed high magnetic fields up to 30 T applied along the tetragonal c axis. The high-field experiments revealed that the field-induced phase II above 26 T corresponds to a commensurate up-up-down ferrimagnetic structure characterized by the wave vector q=(2/3,0,0) with the magnetic moments parallel to the c axis, which naturally explains the one-third magnetization plateau and the substantially changed Fermi surface in phase II. This a-axis modulated magnetic structure indicates that the phase II near the hidden order phase is closely related to the characteristic incommensurate magnetic fluctuations at Q(1)=(0.6,0,0) in the pure system URu(2)Si(2), in contrast to the pressure-induced antiferromagnetic order at Q(0)=(1,0,0).
Collapse
Affiliation(s)
- K Kuwahara
- Institute of Applied Beam Science, Ibaraki University, Mito 310-8512, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
5
|
Sznajd J. Critical point of a para-ferrimagnetic phase transition of the ANNNI model in a field. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2012; 24:436006. [PMID: 23041954 DOI: 10.1088/0953-8984/24/43/436006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The finite field para-ferrimagnetic phase transition in the axial next-nearest-neighbor Ising (ANNNI) model is studied by using the linear perturbation real space renormalization group transformation. The method is examined in systems of ferromagnetic and antiferromagnetic Ising chains coupled by ferromagnetic interactions in the longitudinal field. As one would expect, the external field in the first case destroys the continuous phase transition and in the second shifts the critical point toward a lower temperature according to the square law. For the ferromagnetic chains coupled by the competing interchain nearest-neighbor J(1) < 0 and next-nearest-neighbor J(2) < 0 interactions, the external field changes the character of the phase transition from continuous to discontinuous. However, it has been found that for the ratio J(2)/J(1) around 0.5 there is a critical value of the field for which an isolated critical point exists. The temperature dependences of the specific heat for several values of J(2)/J(1) and the external field are presented.
Collapse
Affiliation(s)
- J Sznajd
- Institute for Low Temperature and Structure Research, Polish Academy of Sciences, Wrocław, Poland.
| |
Collapse
|
6
|
Cermák P, Kratochvílová M, Pajskr K, Javorský P. Magnetic phase diagrams of R2RhIn8 (R = Tb, Dy, Ho, Er and Tm) compounds. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2012; 24:206005. [PMID: 22532213 DOI: 10.1088/0953-8984/24/20/206005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We have grown and characterized single crystals of R(2)RhIn(8) (R=Tb, Dy, Ho, Er and Tm) compounds crystallizing in the tetragonal Ho(2)CoGa(8)-type crystal structure. Their magnetic properties were studied by specific heat and magnetization measurements. All the investigated compounds order antiferromagnetically with Néel temperatures of 43.6, 25.1, 10.9, 3.8 and 4.1 K, respectively. Magnetic phase diagrams were constructed.
Collapse
Affiliation(s)
- P Cermák
- Faculty of Mathematics and Physics, Department of Condensed Matter Physics, Charles University, Prague, The Czech Republic.
| | | | | | | |
Collapse
|
7
|
Kuznietz M, André G, Bourée F, Pinto H, Ettedgui H, Melamud M. Three commensurate magnetic structures in the solid solution U(Ni0.25Cu0.75)2Si2, observed by neutron diffraction. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:3822-3827. [PMID: 9976659 DOI: 10.1103/physrevb.50.3822] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
8
|
Barati M, Datars WR, Chien TR, Stager CV, Garrett JD. Resistivity, Hall effect, and magnetic susceptibility of UPd2Si2. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:16926-16928. [PMID: 10008290 DOI: 10.1103/physrevb.48.16926] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
9
|
Collins MF, Shemirani B, Stager CV, Garrett JD, Lin H, Buyers WJ, Tun Z. Magnetic structure of UPd2Si2 in a magnetic field. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:16500-16504. [PMID: 10008232 DOI: 10.1103/physrevb.48.16500] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
10
|
Kuznietz M, Pinto H, Ettedgui H, Melamud M. Magnetic phase diagram of the U(Ni1-xCux)2Ge2 system studied by ac-susceptibility measurements and neutron diffraction of polycrystalline samples. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:3183-3189. [PMID: 10008742 DOI: 10.1103/physrevb.48.3183] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
11
|
Shemirani B, Lin H, Collins MF, Stager CV, Garrett JD, Buyers WJ. Magnetic structure of UPd2Si2. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:8672-8675. [PMID: 10004909 DOI: 10.1103/physrevb.47.8672] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
12
|
Mailhot A, Plumer ML, Caillé A, Azaria P. Effect of biquadratic exchange on the axial Heisenberg model: Application to the magnetic phase transitions in UNi2Si2. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 45:10399-10407. [PMID: 10000944 DOI: 10.1103/physrevb.45.10399] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
13
|
Kuznietz M, Pinto H, Ettedgui H, Melamud M. Neutron diffraction and ac-susceptibility studies of U(Ni0.1Cu0.9)2Ge2. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 45:7282-7286. [PMID: 10000501 DOI: 10.1103/physrevb.45.7282] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|