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- W2995900453 abstract "Here we report on $Ptext{ensuremath{-}}E$ hysteresis loop measurements that unravel the ferroelectric nature of melanothallite ${mathrm{Cu}}_{2}{mathrm{OCl}}_{2}$, 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 ${mathrm{Cu}}_{2}{mathrm{OCl}}_{2}$ is a spin-induced ferroelectric material. Finally, we show that the ferroelectric properties of ${mathrm{Cu}}_{2}{mathrm{OCl}}_{2}$ 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." @default.
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- W2995900453 date "2019-12-16" @default.
- W2995900453 modified "2023-10-17" @default.
- W2995900453 title "Multiferroic properties of melanothallite <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:msub><mml:mi>Cu</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>OCl</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>" @default.
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- W2995900453 doi "https://doi.org/10.1103/physrevmaterials.3.124405" @default.
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