Current-driven excitations in magnetic multilayer nanopillars from 4.2 k to 300 K
Current-driven excitations in magnetic multilayer nanopillars from 4.2 k to 300 K
复制标题
磁性多层纳米柱中的电流驱动激励（4.2 k 至 300 K）
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
S. Parkin
中科院分区：
文献类型：
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作者：
M. Tsoi;Jonathan Z. Sun;M. Rooks;R. Koch;S. Parkin
我们报道了从电流诱导激发的温度依赖测量中得到的Co/Cu/Co纳米管中自旋转移诱导磁激发的能量阈值的直接实验证据。当温度从4.2K升高到300K时，电流激发阈值降低，但电流阈值与柱子电阻的乘积在∼150K时几乎与温度无关。这一行为支持自旋转移诱导磁激发的能量阈值机制。
We report direct experimental evidence of an energy threshold for spin-transfer-induced magnetic excitations in Co/Cu/Co nanopillars from temperature dependent measurements of current-induced excitations. The current threshold of excitations decreases when the temperature is increased from 4.2 to 300 K. However, the product of the current threshold and the pillar resistance stays almost temperature independent up to a temperature of ∼150 K. This behavior supports the energy-threshold mechanism for spin-transfer-induced magnetic excitations.