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- W2979793453 abstract "We report successive electric-polarization $(P)$ switches in the $S=1/2$ quantum magnet ${mathrm{Co}}_{2}{mathrm{V}}_{2}{mathrm{O}}_{7}$ by application of a magnetic field along the $b$ axis, where a 1/2-magnetization plateau is seen at 5.4--11.6 T. Polarization reversal appears at $ensuremath{sim}5$ T from $ensuremath{-}Pensuremath{parallel}b$ to $+Pensuremath{parallel}b$, leading to an irreversible magnetoelectric history involved with a memory effect, while the polarization flop in fields of 12--17 T is identified by a transition from the $Pensuremath{parallel}b$ to $Pensuremath{parallel}ac$ plane, different from those reported previously. These intriguing magnetoelectric phenomena are owing to the unique nature of the skew-chain-like magnetic structure of ${mathrm{Co}}_{2}{mathrm{V}}_{2}{mathrm{O}}_{7}$ and can be understood by a change in symmetry of the magnetic order in applied fields. The emergent ferroelectricities deviating from the half-plateau state may arise from magnon Bose-Einstein condensation in this quantum magnet." @default.
- W2979793453 created "2019-10-18" @default.
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- W2979793453 date "2019-10-07" @default.
- W2979793453 modified "2023-10-16" @default.
- W2979793453 title "Successive electric-polarization switches in the S=1/2 skew chain Co2V2O7 induced by a high magnetic field" @default.
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- W2979793453 doi "https://doi.org/10.1103/physrevb.100.140403" @default.
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