Laboratorio de Microscopı́as Avanzadas (LMA) - Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza , 50018 Zaragoza, Spain.
Nano Lett. 2014 Feb 12;14(2):423-8. doi: 10.1021/nl402911w. Epub 2014 Jan 7.
We have combined optical and focused ion beam lithographies to produce large aspect-ratio (length-to-width >300) single-crystal nanowires of La2/3Ca1/3MnO3 that preserve their functional properties. Remarkably, an enhanced magnetoresistance value of 34% in an applied magnetic field of 0.1 T in the narrowest 150 nm nanowire is obtained. The strain release at the edges together with a destabilization of the insulating regions is proposed to account for this behavior. This opens new strategies to implement these structures in functional spintronic devices.
我们将光学和聚焦离子束光刻技术相结合，制备了具有大纵横比（长度与宽度之比>300）的 La2/3Ca1/3MnO3 单晶纳米线，且保留了其功能特性。值得注意的是，在最窄的 150nm 纳米线中，在 0.1T 的外加磁场下获得了 34%的增强磁电阻值。提出应变释放和绝缘区失稳来解释这种行为。这为在功能型自旋电子器件中实现这些结构开辟了新的策略。
