Ferroelectric polarization reversal in multiferroic MnWO4 via a rotating magnetic field up to 52 T
Ferroelectric polarization reversal in multiferroic MnWO4 via a rotating magnetic field up to 52 T
复制标题
通过高达 52 T 的旋转磁场实现多铁性 MnWO4 中的铁电极化反转
DOI：
10.1103/physrevb.104.014415
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发表时间：
2021
影响因子：
3.7
通讯作者：
Yang M.
中科院分区：
文献类型：
--
作者：
Wang J. F.;Liu W. X.;He Z. Z.;Liu C. B.;Tokunaga M.;Li M.;Dong C.;Han X. T.;Herlach F.;Lu C. L.;Ouyang Z. W.;Xia Z. C.;Kindo K.;Li L.;Yang M.
在多铁性中，一个长期存在的问题是当磁场沿着磁易轴施加时，电极化反转。在这项工作中，我们在高达52 T的场中进行了全面的铁电极化测量，并在平面上旋转场方向。当场从到旋转时，相对于低场相位，诱导的高场相位倾向于符号反转，这是由于自旋连接矢量的矢量自旋手性从一侧改变到另一侧。特别是，如果磁场稍微偏离磁易轴，就会引起高场相位的突然反转。我们假设极化行为的这种不寻常的角依赖性可以通过对具有相反锥形自旋结构的手性面螺旋度的磁控制来理解。此外，我们还提出了在高电场下对接近铁电相变的手性面进行电场控制。本研究对这种重要的多铁性材料有了全面的了解，并对相关化合物的场致极化开关有了进一步的了解。
A long-standing issue in multiferroicis the electric polarization reversal when magnetic field is applied along the magnetic easy axis. In this work, we performed comprehensive ferroelectric polarization measurements onin fields up to 52 T and with rotating field direction in theplane. When the field is rotated fromto, the induced high-field phasefavors a sign reversal relative to the low-fieldphase, which is attributed to the vector spin chirality changing from one side of the spin connecting vector to the other. Particularly, further slight deviation of the field from the magnetic easy axis towardscauses an abrupt reversal of the high-field phase fromto. We assume that this unusual angular dependence of polarization behavior can be understood by magnetic control of the helicity of the chiral plane with opposite conical spin structures. In addition, we also propose electric-field control of the chiral plane close to the ferroelectric phase transition at high fields. This study results in an overall understanding of this important multiferroic material and sheds light on field-induced polarization switching in related compounds.