向负载电路注入异常霍尔电流

D. Lacour, M. Hehn, Min Xu, J.-E. Wegrowe
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引用次数: 0

摘要

在与横向负载电路接触的霍尔装置中研究了异常霍尔电流注入。这种反常霍尔电流产生于 Co75Gd25 铁磁霍尔条内部,并注入到边缘接触的横向负载电路中。测量的电流、电压和功率是磁化状态、负载电阻 Rl 和温度的函数。结果表明:(1) 霍尔条内部流动的反常霍尔电流的相关电阻是位于横向触点之间的铁氧体部分的电阻;(2) 横向触点导致的电流不均匀性的作用很小;(3) 电流注入负载电路的最大功率效率与两个子电路的电阻匹配条件相对应;(4) 该最大功率效率与反常霍尔角的平方数量级相关。这些观察结果与最近基于非平衡变分法的预测一致。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Injection of anomalous-Hall current into a load circuit
The anomalous-Hall current injection is studied in a Hall device contacted to a lateral load circuit. This anomalous-Hall current is generated inside a Co75Gd25 ferrimagnetic Hall bar and injected into a lateral load circuit contacted at the edges. The current, the voltage, and the power are measured as a function of the magnetization states, the load resistance Rl, and the temperature. It is shown that (1) the resistance associated with the anomalous-Hall current flowing inside the Hall bar is that of the portion of the ferrimagnet located between the lateral contacts, (2) the role of the non-uniformity of the current due to the lateral contacts is small, (3) the maximum power efficiency of the current injection into the load circuit corresponds to the condition of the resistance matching of the two sub-circuits, and (4) this maximum power efficiency is of the order of the square of the anomalous-Hall angle. These observations are in agreement with recent predictions based on a non-equilibrium variational approach.
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