Torque approach for tuning exchange bias training effect in polycrystalline NiFe/FeMn bilayers

Torque approach for tuning exchange bias training effect in polycrystalline NiFe/FeMn bilayers
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用于调节多晶 NiFe/FeMn 双层交换偏置训练效果的扭矩方法

DOI:
10.1063/1.3569140
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发表时间:
2011-03
影响因子:
4
通讯作者:
Zhou, S. M.
Zhou, S. M.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Shi, Z.;Du, J.;Chantrell, R. W.;Mangin, S.;Zhou, S. M.

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为了调整交换偏差训练效果,提出了一种扭矩方法。在面内外部磁场下,通过在一定角度范围内顺时针和逆时针旋转样品,在两个连续磁滞回线之间执行扭矩回线。在0° ~ 180°的角度范围内,双折射率HC和交换场HE均减小,钉扎方向(PD)取向发生变化,表现出第一类训练效应。在-20 ° ~ 380°的角度范围内,虽然HE减小,但HC和PD方向几乎不变,表现出第二类训练效应。
In order to tune the exchange bias training effect, a torque approach is proposed. Torque loops are performed between two consecutive hysteresis loops by clockwise and counterclockwise rotation of the sample within an angular range under an in-plane external magnetic field. For the angular range from 0° to 180°, the coercivity HC and the exchange field HE are both reduced and the pinning direction (PD) orientation is changed, exhibiting the first type training effect. For the angular range from −20° to 380°, HC and the PD orientation are almost unchanged although HE is reduced, exhibiting the second type training effect.
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