Time-Reversal Symmetry Breaking and Consequent Physical Responses Induced by All-In-All-Out Type Magnetic Order on the Pyrochlore Lattice
Time-Reversal Symmetry Breaking and Consequent Physical Responses Induced by All-In-All-Out Type Magnetic Order on the Pyrochlore Lattice
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DOI：
10.7566/jpsj.82.013705
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发表时间：
2013-01-01
影响因子：
1.7
通讯作者：
Arima, Taka-hisa
中科院分区：
文献类型：
--
作者：
Arima, Taka-hisa
讨论了磁矩排列为全进全出型的烧绿石化合物的物理性质。磁序可以看作是磁八极矩的铁性序，它不产生宏观磁化，但破坏了时间反演对称性。由于时间反演对称性破缺，磁致伸缩、磁电容、Voigt磁光效应和磁化率预期具有与外部磁场线性的项。磁序的另一个引人注目的结果是最稳定的{111}表面上存在自发磁化和标量自旋手征。这可能为独特的表面磁输运现象铺平道路。
The physical properties of pyrochlore compounds with the all-in-all-out type arrangement of magnetic moments are discussed. The magnetic order can be regarded as a ferroic order of magnetic octupole moments, which does not give rise to macroscopic magnetization but breaks the time-reversal symmetry. As a result of the time-reversal symmetry breaking, the magnetostriction, magnetocapacitance, Voigt magnetooptic effect, and magnetic susceptibility are expected to have a term linear to the external magnetic field. Another striking consequence of the magnetic order is the presence of spontaneous magnetization and scalar spin chirality on the most stable {111} surfaces. This may pave the way for unique surface magnetotransport phenomena.