Changing and reversing the exchange bias in a current-in-plane spin valve by means of an electric current

Changing and reversing the exchange bias in a current-in-plane spin valve by means of an electric current
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通过电流改变和逆转电流面内自旋阀中的交换偏压

DOI:
10.1063/1.2786592
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发表时间:
2007-09
影响因子:
4
通讯作者:
Zhong, Zhi-Yong
Zhong, Zhi-Yong
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Zhang, Huai-Wu;Tang, Xiao-Li;Su, Hua;Jing, Yu-Lan;Zhong, Zhi-Yong

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作者表明,在不垂直于交换偏置自旋阀的层平面的方向上流动的电流系统地改变交换偏置。当施加足够大的电流时,交换偏置的方向可以完全反转。只有当初始扫描磁场的方向与交换偏置场反平行时,才会发生这种效应。这种效应归因于最近预测的反铁磁体中的电流感应扭矩,并提供证据支持反铁磁体中的临界电流小于铁磁体中电流切换的典型值的预测。
The authors show that a current flowing in a direction not perpendicular to the layer planes of an exchange-biased spin valve systematically changes the exchange bias. The direction of the exchange bias can be completely reversed when a large enough current is applied. This effect occurs only when the direction of the initial sweeping magnetic field is antiparallel to the exchange-bias field. The effect is attributed to the recently predicted current-induced torque in an antiferromagnet and provides evidence to support the prediction that the critical current is smaller in an antiferromagnet than the typical value for current switching in a ferromagnet.
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