2e2/h to e2/h switching of quantum conductance associated with a change in nanoscale ferromagnetic domain structure
2e2/h to e2/h switching of quantum conductance associated with a change in nanoscale ferromagnetic domain structure
复制标题
与纳米级铁磁畴结构变化相关的量子电导从 2e2/h 到 e2/h 的切换
DOI：
10.1063/1.124774
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发表时间：
1999
影响因子：
4
通讯作者：
Y. Otani
中科院分区：
文献类型：
--
作者：
T. Ono;Y. Ooka;H. Miyajima;Y. Otani
我们证明了在一个铁磁镍线和镍板之间的断裂结在外加磁场中形成的镍纳米线的电导量子化。的纳米线的电导是明确量化的单位为2 e2/h在零磁场，但它被切换到e2/h通过施加磁场超过60 Oe。这种切换行为似乎密切相关的铁磁畴形成在附近的纳米线，这表明纳米磁畴壁在确定纳米级自旋相关的运输发挥了重要作用。这种效应为一种新的器件--纳米级巨磁电阻传感器提供了可能。
We demonstrate the electrical conductance quantization in a Ni nanowire formed in a break junction between a ferromagnetic Ni wire and a Ni plate in applied magnetic fields. The conductance of the nanowire is clearly quantized in units of 2e2/h in a zero magnetic field, but it is switched to e2/h by applying magnetic fields above 60 Oe. This switching behavior seems closely related to a ferromagnetic domain formation in the vicinity of a nanowire, suggesting that nanoscale magnetic domain walls play an important role in determining nanoscale spin-dependent transport. The effect offers the possibility of a new device, a nanoscale colossal magnetoresistive sensor.