This title appears in the Scientific Report :
2023
Please use the identifier:
http://dx.doi.org/10.34734/FZJ-2023-04487 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevB.107.014420 in citations.
Magnetic structure of the two-dimensional XY antiferromagnet Sr$_2$CoSi$_2$O$_7$ studied using single-crystal neutron diffraction
Magnetic structure of the two-dimensional XY antiferromagnet Sr$_2$CoSi$_2$O$_7$ studied using single-crystal neutron diffraction
We report a combined polarized and unpolarized neutron diffraction study on a multiferroic Sr$_2$CoSi$_2$O$_7$ (SCSO) single crystal below and above the antiferromagnetic ordering temperature $T_N$ = 6.5 K. Unpolarized neutron diffraction measurements at 15 K confirm the melilite-type tetragonal $P\...
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Personal Name(s): | Dutta, Rajesh (Corresponding author) |
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Thoma, Henrik / Sazonov, Andrew / Náfrádi, Bálint / Meven, Martin / Gukasov, Arsen / Kocsis, Vilmos / Zeitler, Uli / Puri, Alessandro / Tokunaga, Yusuke / Taguchi, Yasujiro / Tokura, Yoshinori / Bordács, Sándor / Kézsmárki, István / Hutanu, Vladimir | |
Contributing Institute: |
JCNS-4; JCNS-4 Heinz Maier-Leibnitz Zentrum; MLZ Streumethoden; JCNS-2 JARA-FIT; JARA-FIT JCNS-FRM-II; JCNS-FRM-II |
Published in: | Physical review / B, 107 (2023) 1, S. 014420 |
Imprint: |
Woodbury, NY
Inst.
2023
|
DOI: |
10.34734/FZJ-2023-04487 |
DOI: |
10.1103/PhysRevB.107.014420 |
Document Type: |
Journal Article |
Research Program: |
Materials – Quantum, Complex and Functional Materials Jülich Centre for Neutron Research (JCNS) (FZJ) |
Subject (ZB): | |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1103/PhysRevB.107.014420 in citations.
We report a combined polarized and unpolarized neutron diffraction study on a multiferroic Sr$_2$CoSi$_2$O$_7$ (SCSO) single crystal below and above the antiferromagnetic ordering temperature $T_N$ = 6.5 K. Unpolarized neutron diffraction measurements at 15 K confirm the melilite-type tetragonal $P\overline{4}2_1m$ space group as the parent structure of SCSO. The low temperature study at 2.3 K, in contrast, reveals symmetry lowering with the orthorhombic Cmm′2′ and $P2_12′_12′$ magnetic space groups being equally possible. In these $Cmm′2′$ and $P2_12′_12′$ magnetic space groups we obtain a very similar ordered magnetic moment about 2.86 and 2.94μB/Co$^{2+}$, respectively, which lies in the $ab$ plane. Our spin polarized flipping ratio measurements under an applied magnetic field of 6 T in the paramagnetic state support the results of our bulk magnetization data, indicating strong easy-plane spin anisotropy, responsible for the in-plane order below $T_N$. |