Magnetic frustration, phase competition, and the magnetoelectric effect in NdFe3(BO3)4.
Magnetic frustration, phase competition, and the magnetoelectric effect in NdFe3(BO3)4.
复制标题
NdFe3(BO3)4 中的磁挫败、相竞争和磁电效应
DOI：
10.1103/physrevlett.109.267202
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发表时间：
2012
影响因子：
8.6
通讯作者：
J. Geck
中科院分区：
文献类型：
--
作者：
J.E. Hamann-Borrero;S. Partzsch;S. Valencia;C. Mazzoli;J. Herrero-Martin;R. Feyerherm;E. Dudzik;C. Hess;A. Vasiliev;L. Bezmaternykh;B. Büchner;J. Geck
本文用元素选择共振磁x射线散射方法研究了温度和外加磁场对元素选择共振磁x射线散射的影响。我们的测量表明，Nd亚晶格的磁序是由Fe自旋序诱导的。当平行于六边形基面施加磁场时，螺旋自旋有序被抑制，并且共线有序被稳定，其中力矩被迫在垂直于所施加磁场的方向上对齐。这一结果排除了非共线的自旋顺序作为起源的磁感应极化在这个化合物。相反，我们的数据表明，磁挫折的结果在相位竞争，这是磁电响应的起源。
We present an element selective resonant magnetic x-ray scattering study ofas a function of temperature and applied magnetic field. Our measurements show that the magnetic order of the Nd sublattice is induced by the Fe spin order. When a magnetic field is applied parallel to the hexagonal basal plane, the helicoidal spin order is suppressed and a collinear ordering, where the moments are forced to align in a direction perpendicular to the applied magnetic field, is stabilized. This result excludes a noncollinear spin order as the origin of the magnetically induced electric polarization in this compound. Instead our data imply that magnetic frustration results in a phase competition, which is the origin of the magnetoelectric response.