Anomalous Hall effect of PdCo alloy thin films to detect low hydrogen concentration in air
Anomalous Hall effect of PdCo alloy thin films to detect low hydrogen concentration in air
复制标题
DOI：
10.1016/j.ijhydene.2021.12.085
复制
发表时间：
2021-12
影响因子：
7.2
通讯作者：
S. Akamaru;Haruya Yamamoto;M. Hara
中科院分区：
文献类型：
--
作者：
S. Akamaru;Haruya Yamamoto;M. Hara
研究了PdCo薄膜（Pd0.8Co0.2合金薄膜;厚度为5、15和30 nm）在气相中不同氢浓度下的异常霍尔效应。15和30 nm厚的PdCo薄膜对外磁场的霍尔电压表现出滞后现象，表明PdCo存在异常霍尔效应。在所有考虑的磁场中，在5 nm PdCo膜中的氢吸收降低了霍尔电压。此外，霍尔电压在零磁场附近的斜率减小。当以N2为载气时，斜率与氢气浓度的对数成正比。对于干燥的空气，斜率不同，并类似于N2低于和高于氢浓度为0.5%和1.0%，分别。在干燥空气中，当氢浓度较低时，PdCo表面的吸附氧会干扰PdCo中的溶解氢。
The anomalous Hall effect of thin PdCo films (Pd0.8Co0.2alloy films; 5, 15, and 30 nm thick) subjected to various hydrogen concentrations in the gas phase was investigated. The Hall voltage of the 15 and 30 nm thick PdCo films against an external magnetic field exhibited hysteresis, indicating the anomalous Hall effect of PdCo. The hydrogen absorption in the 5 nm PdCo film decreased the Hall voltage in all considered magnetic fields. Moreover, the slope of the Hall voltage around a zero magnetic field decreased. When N2was used as the carrier gas, the slope was proportional to the logarithm of the hydrogen concentration. For dry air, the slope differed from and was similar to that for N2below and above hydrogen concentrations of 0.5% and 1.0%, respectively. The adsorbed oxygen on the PdCo surface disturbed the dissolved hydrogen in PdCo at low hydrogen concentrations in dry air.