Magnetic Field-Oriented Electrical Transport Properties in Antiperovskite Mn3SnC
Magnetic Field-Oriented Electrical Transport Properties in Antiperovskite Mn3SnC
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反钙钛矿 Mn3SnC 的磁场定向电输运特性
DOI：
10.1002/pssr.202100614
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发表时间：
2022
影响因子：
2.8
通讯作者：
吴涛
中科院分区：
文献类型：
--
作者：
吴鹏;闫君;梁鹏利;祝智峰;吴涛
反钙钛矿块状材料在磁传感器、零热膨胀和磁热效应等方面具有广泛的应用前景。因此，在多维度上深入研究材料是很重要的。本文采用可变平面尺寸的Mn3SnC厚膜进行纵向电阻率、磁化率和铁磁共振（FMR）性能研究。首次发现了平面内（IP）磁场下一阶相变前后Mn3SnC的异常热滞回线特征和角相关的纵向电阻率。这种异常热滞回线受磁场方向、激流角和磁场强度的影响。角相关的纵向电阻率测量表明，Mn3SnC的电输运性质与IP磁场方向相关，并表现出较高的角灵敏度。Mn3SnC的这种新特性与自旋霍尔磁阻有关。IP和面外磁化强度之间的差异表明Mn原子的平面排列是可变的，这影响了磁相互作用。研究了Mn3SnC样品的FMR动态特性，相变温度与电输运和磁化研究的温度一致。
Antiperovskite bulk materials show attractive properties and have potential applications on the magnetic sensor, zero thermal expansion, and magnetocaloric effect. Hence, it is important to intensively study the materials on multiple dimensionalities. Herein, the Mn3SnC thick films with variable planar size are used for longitudinal resistivity, magnetization, and ferromagnetic resonance (FMR) properties study. An abnormal thermal hysteresis loop feature and angular‐dependant longitudinal resistivity of the Mn3SnC around the first‐order phase transition under in‐plane (IP) magnetic field for the first time are found. This abnormal thermal hysteresis loop is affected by magnetic field direction, IP angle, and field strength. The angular‐dependent longitudinal resistivity measurement implies that the electrical transport properties of Mn3SnC correlate with the IP magnetic field orientation and show high angular sensitivity. This novel feature of Mn3SnC relates to the spin‐Hall magnetoresistance. The discrepancy between IP and out‐of‐plane magnetization indicates the variable planer arrangement of Mn atoms, which affects magnetic interactions. The dynamic property of FMR is studied on the Mn3SnC sample, and the phase transition temperature is consistent with that of the electrical transport and magnetization study.