Mechanism of anomalously large magnetoresistance in nanosized tunnel contacts

我们在纳米探针系统形成的纳米隧道接触中观察到异常大的磁阻。在这项研究中，研究了三种可能的机制：由探针和薄膜之间的大电场形成的纳米结构，一种新的磁输运现象，以及探针系统的变形。实验结果表明，通过扫描探针在薄膜上的原子迁移，虽然它不是决定性的。

We observed anomalously large magentoresistance in nanosized tunnel contacts formed by a nanoprober system. In this study, three possible mechanisms for the observed phenomenon were examined: the formation of a nanostructure by a large electric field between probe and thin film, a novel magnetotransport phenomenon, and the deformation of the prober system. An experimental result suggesting that atoms migrates by the scanning of the probe on the thin film was obtained, although it was not conclusive.