Magnetochiral Dichroism in a Collinear Antiferromagnet with No Magnetization
Magnetochiral Dichroism in a Collinear Antiferromagnet with No Magnetization
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DOI：
10.1103/physrevlett.124.217402
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发表时间：
2020-05-27
影响因子：
8.6
通讯作者：
Arima, Taka-hisa
中科院分区：
文献类型：
--
作者：
Sato, Tatsuki;Abe, Nobuyuki;Arima, Taka-hisa
我们展示了共线反铁磁体MnTiO 3的方向二向色性。在没有外场的情况下，两个具有相反符号的交错磁矩的反铁磁态之间的二向色性可以被认为是磁手征二向色性。反铁磁畴的电场反转引起2.15 eV左右的非偏振光的吸收强度的变化。两个反铁磁态之间的光吸收差异对于沿相反方向传播的光是相反的。对于扫描外部电场或磁场的周期，吸收系数显示滞后行为。
We show the directional dichroism in a collinear antiferromagnet MnTiO3. The dichroism between two distinctive antiferromagnetic states with opposite signs of staggered magnetic moments can be regarded as magnetochiral dichroism in the absence of external fields. Electric-field reversal of antiferromagnetic domain causes a change in the absorption intensity of unpolarized light around 2.15 eV. The difference in optical absorption between two antiferromagnetic states is reversed for the light propagating in the opposite direction. The absorption coefficient displays a hysteretic behavior for a cycle of sweeping the external electric or magnetic field.