Magnetic-field-induced polarization and depolarization in HoMn2O5 and ErMn2O5
Magnetic-field-induced polarization and depolarization in HoMn2O5 and ErMn2O5
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DOI：
10.1103/physrevb.72.064421
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发表时间：
2005-08-01
影响因子：
3.7
通讯作者：
Tokura, Y
中科院分区：
文献类型：
--
作者：
Higashiyama, D;Miyasaka, S;Tokura, Y
研究了磁场 (H) 对 RMn2O5（R=Ho 和 Er）介电性能的影响，RMn2O5 在 35 K 左右转变为铁电态。随着温度 (T) 进一步降低，HoMn2O5 显示出第二次介电转变为最低 T 相 (X)，其中自发极化几乎为零。 H的应用稳定了HoMn2O5中的铁电相，而ErMn2O5中的X相稳定为基态。因此，伴随着磁滞现象，电极化可以被H引起或消除。这些化合物的相图已在 T vs H 平面上建立。
The effects of the magnetic field (H) on dielectric properties have been investigated for RMn2O5 (R=Ho and Er), which undergo a transition to a ferroelectric state around 35 K. With further decreasing temperature (T), HoMn2O5 shows the second dielectric transition to the lowest-T phase (X), where spontaneous polarization is almost zero. The application of H stabilizes the ferroelectric phase in HoMn2O5, while the X phase in ErMn2O5 as the ground state. Accordingly, the electric polarization can be induced or extinguished by H, accompanying the hysteresis. Phase diagrams of these compounds have been established in the plane of T vs H.