This title appears in the Scientific Report :
2019
Please use the identifier:
http://hdl.handle.net/2128/23790 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevMaterials.3.124405 in citations.
Multiferroic properties of melanothallite Cu 2 OCl 2
Multiferroic properties of melanothallite Cu 2 OCl 2
Here we report on P−E hysteresis loop measurements that unravel the ferroelectric nature of melanothallite Cu2OCl2, a new multiferroic material with high critical temperature. Its spin structure was investigated by polarized and unpolarized neutron scattering experiments which reveal a cycloidal mag...
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Personal Name(s): | Guo, H. |
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Zhao, L. / Schmidt, W. / Fernández-Díaz, M. T. / Becker, Ch. / Melendez-Sans, A. / Peng, W. / Zbiri, M. / Hansmann, P. / Komarek, A. C. (Corresponding author) | |
Contributing Institute: |
Streumethoden; JCNS-2 JCNS-ILL; JCNS-ILL JARA-FIT; JARA-FIT Streumethoden; PGI-4 |
Published in: | Physical review materials, 3 (2019) 12, S. 124405 |
Imprint: |
College Park, MD
APS
2019
|
DOI: |
10.1103/PhysRevMaterials.3.124405 |
Document Type: |
Journal Article |
Research Program: |
Jülich Centre for Neutron Research (JCNS) Materials and Processes for Energy and Transport Technologies Quantum Condensed Matter: Magnetism, Superconductivity Controlling Collective States Controlling Collective States |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1103/PhysRevMaterials.3.124405 in citations.
Here we report on P−E hysteresis loop measurements that unravel the ferroelectric nature of melanothallite Cu2OCl2, a new multiferroic material with high critical temperature. Its spin structure was investigated by polarized and unpolarized neutron scattering experiments which reveal a cycloidal magnetic structure with vector chirality (magnetic polarity) that can be inverted by opposite poling of the sample with an inverted electric field. This shows that Cu2OCl2 is a spin-induced ferroelectric material. Finally, we show that the ferroelectric properties of Cu2OCl2 are driven by the inverse Dzyaloshinskii-Moriya interaction mechanism which is also able to predict the observed direction of the ferroelectric polarization properly. The origin of the noncollinear spin structure in melanothallite are competing AFM-FM exchange couplings which we estimate from a combined ab initio + cluster configuration interaction calculation. |