Field-induced metamagnetic transition and nonsaturating magnetoresistance in the antiferromagnetic semimetal NdSb
Field-induced metamagnetic transition and nonsaturating magnetoresistance in the antiferromagnetic semimetal NdSb
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反铁磁半金属 NdSb 中的场致变磁转变和非饱和磁阻
DOI：
10.1103/physrevb.96.205122
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发表时间：
2017
影响因子：
3.7
通讯作者：
Yang Zhaorong
中科院分区：
文献类型：
--
作者：
Zhou Ying;Zhu Xiangde;Huang Sha;Chen Xuliang;Zhou Yonghui;An Chao;Zhang Bowen;Yuan Yifang;Xia Zhengcai;Gu Chuanchuan;Yang Zhaorong
在高达60T的脉冲强磁场下，我们对反铁磁性半金属NdSb的磁化强度和磁阻进行了联合研究。结果表明，NdSb表现出极大的磁阻，在1.3K和60T时达到$1.77\ifmmode\times\else\texttimes\fi{}{10}^{6}%$的值，没有任何饱和迹象。4.2K时的场相关磁化强度揭示了9T附近的场诱导从AFM到铁磁态的变磁转变。在变磁转变过程中，电阻发生了阶梯状的减小，类似于金属多层膜的巨磁电阻(GMR)行为。对NdSb的Shubnikov-de Haas效应的研究表明，除了完美的电子-空穴补偿外，一种特殊的轨道织构可能对XMR效应有贡献。
We have performed a joint study of magnetization and magnetoresistance in the antiferromagnetic (AFM) semimetal NdSb under pulsed high magnetic field up to 60 T. We show that NdSb displays extremely large magnetoresistance (XMR), reaching values of $1.77\ifmmode\times\else\texttimes\fi{}{10}^{6}%$ at 1.3 K and 60 T without any sign of saturation. The field-dependent magnetization at 4.2 K reveals a field-induced metamagnetic transition from the AFM to the ferromagnetic state around 9 T. During the metamagnetic transition, a steplike reduction of resistance occurs, resembling the giant magnetoresistance (GMR) behavior in metallic multilayers. The investigation of the Shubnikov--de Haas effect in NdSb suggests that a particular orbital texture might contribute to the XMR effect in addition to the perfect electron-hole compensation.