Hall effect of itinerant electron metamagnet Co(S1-xSex)2
Hall effect of itinerant electron metamagnet Co(S1-xSex)2
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巡回电子永磁体Co(S1-xSex)2的霍尔效应
DOI：
10.1016/j.jmmm.2022.169460
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Tamio Oguchi and Hisatomo Harima
中科院分区：
文献类型：
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作者：
Kosuke Tanabe;Yoshiro Maekawa;Hirofumi Wada;Kunihiko Yamauchi;Tamio Oguchi and Hisatomo Harima
我们研究了0.08≤x≤0.14的Co(S1-xSex)2的霍尔效应，它表现出巡回电子亚磁性(IEM)。测量霍尔电阻率 ρxy 作为不同温度下磁场的函数。研究发现，在顺磁态下，ρxy随着B的增加几乎呈线性减小，而在铁磁态下，ρxy呈正斜率。在 ρxy-B 曲线中的变磁转变场周围观察到突然下降，这归因于反常霍尔效应。通过对ρxy-B曲线和磁化曲线的分析，我们估计了反常霍尔系数、铁磁态下的正常（普通）霍尔系数和顺磁态下的霍尔系数。根据 IEM 中的磁场，铁磁和顺磁状态的出现使得同时估计这些值成为可能。将估计的法向霍尔系数与根据能带结构计算的理论值进行比较。目前的研究表明，IEM 提供了一个合适的平台来理解相同温度下巡回电子系统的铁磁态和顺磁态的电子结构。
We have studied the Hall effect of Co(S1-xSex)2with 0.08 ≤x≤ 0.14, which shows itinerant electron metamagnetism (IEM). The Hall resistivity ρxywas measured as a function of the magnetic fieldBat various temperatures. It is found that ρxydecreases nearly linearly with increasingBin the paramagnetic state, while it has a positive slope in the ferromagnetic state. Abrupt drops were observed at around the metamagnetic transition field in the ρxy–Bcurves, which are attributable to the anomalous Hall effect. From the analyses of the ρxy–Bcurves and the magnetization curves, we estimated the anomalous Hall coefficient, the normal (ordinary) Hall coefficient in the ferromagnetic state, and that in the paramagnetic state. Appearance of both ferromagnetic and paramagnetic states depending on a magnetic field in IEM makes it possible to estimate these values, simultaneously. The estimated normal Hall coefficients are compared with the theoretical values calculated from the energy band structures. The present study has demonstrated that IEM provides a suitable stage to understand the electronic structures of both ferromagnetic and paramagnetic states of the itinerant electron system at the same temperature.