Spin transfer nano-oscillators
Zhongming Zeng (1), Giovanni Finocchio (2), and Hongwen Jiang (3),, ((1) Suzhou Institute of Nano-tech, Nano-bionics, Chinese Academy of, Sciences, Suzhou, P. R. China (2) Department of Electronic Engineering,, Industrial chemistry, Engineering, University of Messina, Messina
TL;DR
This paper reviews recent advances in spin transfer nano-oscillators, highlighting improvements in materials, design, and power output, and discusses future challenges and research directions.
Contribution
It provides a comprehensive overview of recent developments in STNOs, including new material and geometry innovations, and presents the latest progress in increasing their output power.
Findings
Enhanced output power towards the microwatt range
Development of STNOs with perpendicular anisotropy
Identification of future research challenges
Abstract
The use of spin transfer nano-oscillators (STNOs) to generate microwave signal in nanoscale devices have aroused tremendous and continuous research interest in recent years. Their key features are frequency tunability, nanoscale size, broad working temperature, and easy integration with standard silicon technology. In this feature article, we give an overview of recent developments and breakthroughs in the materials, geometry design and properties of STNOs. We focus in more depth on our latest advances in STNOs with perpendicular anisotropy showing a way to improve the output power of STNO towards the {\mu}W range. Challenges and perspectives of the STNOs that might be productive topics for future research were also briefly discussed.
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