This title appears in the Scientific Report :
2017
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevB.95.174431 in citations.
Please use the identifier: http://hdl.handle.net/2128/16148 in citations.
Magnetic structure of the magnetoelectric material Ca$_{2}$CoSi$_{2}$O$_{7}$
Magnetic structure of the magnetoelectric material Ca$_{2}$CoSi$_{2}$O$_{7}$
Detailed investigation of Ca$_{2}$CoSi$_{2}$O$_{7}$ was performed in its low-temperature magnetoelectric state combining neutron diffraction with magnetization measurements on single crystals. The crystal and magnetic structures well below the antiferromagnetic transition temperature of TN≈5.7 K wer...
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Personal Name(s): | Sazonov, A. (Corresponding author) |
---|---|
Hutanu, V. / Meven, M. / Roth, G. / Murakawa, H. / Tokura, Y. / Guduru, V. K. / Peters, L. C. J. M. / Zeitler, U. / Kiss, L. F. / Szaller, D. / Náfrádi, B. / Kézsmárki, I. | |
Contributing Institute: |
Streumethoden; JCNS-2 JCNS-FRM-II; JCNS-FRM-II |
Published in: | Physical Review B Physical review / B, 95 95 (2017 2017) 17 17, S. 174431 174431 |
Imprint: |
Woodbury, NY
Inst.
2017
|
DOI: |
10.1103/PhysRevB.95.174431 |
Document Type: |
Journal Article |
Research Program: |
FRM II / MLZ Jülich Centre for Neutron Research (JCNS) Materials and Processes for Energy and Transport Technologies Controlling Collective States |
Subject (ZB): | |
Link: |
Get full text OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/16148 in citations.
Detailed investigation of Ca$_{2}$CoSi$_{2}$O$_{7}$ was performed in its low-temperature magnetoelectric state combining neutron diffraction with magnetization measurements on single crystals. The crystal and magnetic structures well below the antiferromagnetic transition temperature of TN≈5.7 K were determined using neutron diffraction. Neutron diffraction data imply no structural phase transition from 10 K down to 2.5 K and are well described within the orthorhombic space group P21212 with a 3×3×1 supercell compared with the high-temperature unmodulated state (tetragonal space group P¯421m). We found that in zero magnetic field the magnetic space group is P212′12′ with antiferromagnetic order along the [100] or [010] axes for two types of 90∘ twin domains, while neighboring spins along the [001] axis are ordered ferromagnetically. A noncollinear spin arrangement due to small canting within the ab plane is allowed by symmetry and leads to the existence of the tiny spontaneous magnetization below TN. The ordered moment with a magnitude of about 2.8 μB/Co$_{2}$+ at 2.5 K lies in the ab plane. Distinct differences between the magnetic structure of Ca$_{2}$CoSi$_{2}$O$_{7}$ as compared to those of Ba$_{2}$CoGe$_{2}$O$_{7}$ and Sr$_{2}$CoSi$_{2}$O$_{7}$ are discussed. |