1
|
Plokhikh IV, Tsirlin AA, Khalyavin DD, Fischer HE, Shevelkov AV, Pfitzner A. Effect of antifluorite layer on the magnetic order in Eu-based 1111 compounds, EuTAsF (T = Zn, Mn, and Fe). Phys Chem Chem Phys 2023; 25:4862-4871. [PMID: 36692371 DOI: 10.1039/d2cp04863a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The 1111 compounds with an alternating sequence of fluorite and antifluorite layers serve as structural hosts for the vast family of Fe-based superconductors. Here, we use neutron powder diffraction and density-functional-theory (DFT) band-structure calculations to study magnetic order of Eu2+ in the [EuF]+ fluorite layers depending on the nature of the [TAs]- antifluorite layer that can be non-magnetic semiconducting (T = Zn), magnetic semiconducting (T = Mn), or magnetic metallic (T = Fe). Antiferromagnetic transitions at TN ∼ 2.4-3 K due to an ordering of the Eu2+ magnetic moments were confirmed in all three EuTAsF compounds. Whereas in EuTAsF (T = Zn and Mn), the commensurate k1 = (½ ½ 0) stripe order pattern with magnetic moments within the a-b plane is observed, the order in EuFeAsF is incommensurate with k = (0 0.961(1) ½) and represents a cycloid of Eu2+ magnetic moments confined within the bc-plane. Additionally, the Mn2+ sublattice in EuMnAsF features a robust G-type antiferromagnetic order that persists at least up to room temperature, with magnetic moments along the c-direction. Although DFT calculations suggest stripe antiferromagnetic order in the Fe-sublattice of EuFeAsF as the ground state, neutron diffraction reveals no evidence of long-range magnetic order associated with Fe. We show that the frustrating interplane interaction J3 between the adjacent [EuF]+ layers is comparable with in-plane J1-J2 interactions already in the case of semiconducting fluorite layers [TAs]- (T = Zn and Mn) and becomes dominant in the case of the metallic [FeAs]- ones. The latter, along with a slight orthorhombic distortion, is proposed to be the origin of the incommensurate magnetic structure observed in EuFeAsF.
Collapse
Affiliation(s)
- Igor V Plokhikh
- Laboratory for Multiscale Materials Experiments, Paul Scherrer Institut, PSI, Villigen, CH-5232, Switzerland.
| | - Alexander A Tsirlin
- Felix Bloch Institute for Solid-State Physics, University of Leipzig, 04103, Leipzig, Germany
| | - Dmitry D Khalyavin
- ISIS Facility, Rutherford Appleton Laboratory, Harwell Oxford, OX11 0QX, Didcot, UK
| | - Henry E Fischer
- Institut Laue-Langevin, 71 avenue des Martyrs, CS 20156, 38042, Grenoble Cédex 9, France
| | - Andrei V Shevelkov
- Department of Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - Arno Pfitzner
- Institute of Inorganic Chemistry, University of Regensburg, 93053, Regensburg, Germany
| |
Collapse
|
2
|
Charkin DO, Kuznetsov AN. When Four Ones are Equal to Ten on the Interest Scale: ZrSiCuAs/LaOAgS Type Revisited (Review). RUSS J INORG CHEM+ 2022. [DOI: 10.1134/s0036023622050047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
3
|
Plokhikh IV, Tsirlin AA, Heletta L, Klenner S, Charkin DO, Kuznetsov AN, Shevelkov AV, Pöttgen R, Pfitzner A. Synthesis, electronic structure and physical properties of two new layered compounds, EuFAgSe and EuFAg 1-δTe, featuring the active redox pair Eu 2+/Ag . Dalton Trans 2020; 49:7426-7435. [PMID: 32432284 DOI: 10.1039/d0dt01504k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Systematic studies of the ZrCuSiAs (also LaOAgS or 1111) structure type resulted in the synthesis of two new fluoride chalcogenides, EuFAgSe and EuFAg1-δTe, whereas their sulfide analog, EuFAgS, could not be obtained. Both new compounds are tetragonal, P4/nmm, with cell parameters a = 4.1542(1) Å, c = 9.2182(1) Å for the selenide and a = 4.3255(1) Å, c = 9.5486(1) Å for the telluride. Rietveld refinement reveals a significant silver deficiency in the telluride (δ = 0.05), while the selenide is nearly stoichiometric. Both compounds are semiconductors as shown by diffuse reflectance spectroscopy and confirmed by density-functional calculations of the band structure. Magnetism of both compounds is predominantly driven by Eu2+, as indicated by magnetic susceptibility measurements and corroborated by 151Eu Mössbauer spectroscopy. EuFAg1-δTe and EuFAgSe are paramagnetic down to 1.8 K.
Collapse
Affiliation(s)
| | - Alexander A Tsirlin
- Experimental Physics VI, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, 86135 Augsburg, Germany
| | - Lukas Heletta
- Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstrasse 30, D-48149 Münster, Germany
| | - Steffen Klenner
- Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstrasse 30, D-48149 Münster, Germany
| | - Dmitri O Charkin
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Alexey N Kuznetsov
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia and N.S. Kurnakov Institute of General and Inorganic Chemistry, 119991 Moscow, Russia
| | - Andrei V Shevelkov
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Rainer Pöttgen
- Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstrasse 30, D-48149 Münster, Germany
| | - Arno Pfitzner
- Univeristy of Regensburg, 93053 Regensburg, Germany.
| |
Collapse
|
4
|
Lin D, Luo Q, Zheng H, Tang L, Zhan W, Tang K. A new oxygen-free cobalt-based compound SmCoAsF with multiple magnetic transitions. CrystEngComm 2020. [DOI: 10.1039/d0ce00448k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new quaternary oxygen-free cobalt-based compound SmCoAsF, which crystallizes with the tetragonal ZrCuSiAs-type structure, is synthesized via a solid state metathesis reaction.
Collapse
Affiliation(s)
- Dan Lin
- Department of Chemistry
- University of Science and Technology of China
- Hefei
- People's Republic of China
| | - Qinxin Luo
- Department of Chemistry
- University of Science and Technology of China
- Hefei
- People's Republic of China
| | - Hui Zheng
- Department of Chemistry
- University of Science and Technology of China
- Hefei
- People's Republic of China
| | - Lulu Tang
- Department of Chemistry
- University of Science and Technology of China
- Hefei
- People's Republic of China
| | - Wenqi Zhan
- Department of Chemistry
- University of Science and Technology of China
- Hefei
- People's Republic of China
| | - Kaibin Tang
- Department of Chemistry
- University of Science and Technology of China
- Hefei
- People's Republic of China
- Hefei National Laboratory for Physical Sciences at Microscale
| |
Collapse
|
5
|
Plokhikh IV, Kuznetsov AN, Charkin DO, Shevelkov AV, Pfitzner A. Layered Compounds BaFMgPn (Pn = P, As, Sb, and Bi), Transition-Metal-Free Representatives of the 1111 Structure Type. Inorg Chem 2019; 58:3435-3443. [PMID: 30788958 DOI: 10.1021/acs.inorgchem.8b03554] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Four new transition metal-free pnictide representatives of the LaOAgS structure type were predicted by DFT calculations and found in the BaFMgPn (Pn = P, As, Sb and Bi) family. The compounds adopt the tetragonal space group P4 /nmm with the unit cell parameters a/ c 4.3097(1) Å/9.5032(1) Å, 4.3855(1) Å/9.5918(1) Å, 4.5733(1) Å/9.8184(1) Å, and 4.6359(1) Å/9.8599(1) Å, respectively. According to the DFT calculations, these new compounds are semiconductors with band gaps steadily decreasing from Pn = P ( ca. 2 eV) to Pn = Bi ( ca. 1 eV). The corresponding strontium fluoride and rare-earth oxide analogs are unlikely to exist and have not been observed yet. The trends of the stability within 1111 and structurally and/or chemically related compounds based on a combined consideration of geometry and DFT calculations are discussed.
Collapse
Affiliation(s)
| | - Alexey N Kuznetsov
- Department of Chemistry , Lomonosov Moscow State University , 119991 Moscow , Russia.,Kurnakov Institute of General and Inorganic Chemistry RAS , 119991 Moscow , Russia
| | - Dmitri O Charkin
- Department of Chemistry , Lomonosov Moscow State University , 119991 Moscow , Russia
| | - Andrei V Shevelkov
- Department of Chemistry , Lomonosov Moscow State University , 119991 Moscow , Russia
| | - Arno Pfitzner
- Univeristy of Regensburg , 93053 Regensburg , Germany
| |
Collapse
|
6
|
Systematic study of structural, electronic, optical and thermodynamic properties of SrFCuTe compound. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2018.10.040] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
7
|
Ovchinnikov A, Bobev S. Zintl phases with group 15 elements and the transition metals: A brief overview of pnictides with diverse and complex structures. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2018.11.029] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
8
|
Plokhikh I, Charkin D, Verchenko V, Kuznetsov A, Tsirlin A, Kazakov S, Shevelkov A. Synthesis, crystal structure and physical properties of europium – manganese fluoride pnictides, EuMnPnF (Pn = P, As, Sb). J SOLID STATE CHEM 2018. [DOI: 10.1016/j.jssc.2017.12.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|