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  Multiferroic properties of melanothallite Cu2OCl2

Guo, H., Zhao, L., Schmidt, W., Fernández-Díaz, M. T., Becker, C., Melendez-Sans, A., et al. (2019). Multiferroic properties of melanothallite Cu2OCl2. Physical Review Materials, 3(12): 124405, pp. 1-8. doi:10.1103/PhysRevMaterials.3.124405.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-6CFB-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-6D00-1
Genre: Journal Article

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 Creators:
Guo, H.1, Author              
Zhao, L.1, Author              
Schmidt, W.2, Author
Fernández-Díaz, M. T.2, Author
Becker, Ch.1, Author              
Melendez-Sans, A.1, Author              
Peng, W.1, Author              
Zbiri, M.2, Author
Hansmann, P.1, Author              
Komarek, A. C.3, Author              
Affiliations:
1Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
2External Organizations, ou_persistent22              
3Alexander Komarek, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863446              

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 Abstract: 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.

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Language(s): eng - English
 Dates: 2019-12-162019-12-16
 Publication Status: Published in print
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 Table of Contents: -
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Title: Physical Review Materials
  Abbreviation : Phys. Rev. Mat.
Source Genre: Journal
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Publ. Info: College Park, MD : American Physical Society
Pages: - Volume / Issue: 3 (12) Sequence Number: 124405 Start / End Page: 1 - 8 Identifier: ISSN: 2475-9953
CoNE: https://pure.mpg.de/cone/journals/resource/2475-9953