Efficient spin transfer torque in La2/3Sr1/3MnO3 nanostructures
Efficient spin transfer torque in La2/3Sr1/3MnO3 nanostructures
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DOI：
10.1063/1.4865415
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发表时间：
2014-02-17
影响因子：
4
通讯作者：
Klaeui, Mathias
中科院分区：
文献类型：
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作者：
Foerster, Michael;Pena, Luis;Klaeui, Mathias
我们进行低温磁输运测量纳米结构的La 2/3Sr 1/3 MnO 3线，研究自旋极化电流和磁化强度之间的相互作用，在这个半金属材料。我们通过施加外场来选择性地定位畴壁。畴壁电阻被发现是积极的，在传统的三维金属。当电流脉冲被注入到导线中时，退钉扎场减小。通过比较两种电流极性的测量，我们可以解开加热和自旋转移力矩的影响。所确定的自旋转移扭矩效率为4 × 10（-14）Tm-2/A的量级，这显著高于坡莫合金。(C)2014 AIP Publishing LLC.
We carry out low temperature magnetotransport measurements on nanostructured La2/3Sr1/3MnO3 wires to study the interaction between spin-polarized current and magnetization in this half metallic material. We selectively position domain walls by applying external fields. The domain wall resistance is found to be positive, in contrast to conventional 3d metals. The depinning field is reduced when current pulses are injected into the wire. By comparing measurements for both current polarities, we can disentangle heating and spin transfer torque effects. The determined spin transfer torque efficiency is of the order of 4 x 10(-14) Tm-2/A, which is significantly higher than in permalloy. (C) 2014 AIP Publishing LLC.