自旋纳米振荡器

Spin transfer nano-oscillators

自旋纳米振荡器是基于磁电阻效应和自旋转移力矩效应的一种新型纳米微波器件.它具有结构简单、尺寸小、频率调制范围宽、工作温度范围宽、以及工作电压低且易于集成等特点,在无线通讯、微波源和微波检测等领域具有广阔应用前景.自2003年首次在实验上实现后,实验技术迅速突破,引起了学术界和产业界的广泛关注.本文首先简要介绍自旋纳米振荡器的基本工作原理,然后结合我们的研究工作回顾近几年的实验研究进展,并讨论面临的挑战及展望可能解决的途径.

Spin transfer nano-oscillator （STO）, a new class of nano-sized microwave device based on giant magnetoresistance and spin transfer torque effect, has aroused tremendous and continuous research interest due to its potential applications in wireless communications system as either microwave source or detectors. The key features of STOs are simple structure, nanoscale size, frequency tunability, broad working temperature, low operating voltage and easy integration with standard silicon technology. In this review paper, we give an overview of the working principle of STOs, recent developments and breakthroughs. Challenges and perspectives of the STOs that might be productive topics for future research are also briefly discussed.