Spintronics is the essential technology for ultra-low power consumption, high speed, nonvolatile magnetic memory and logic devices. However, it has been believed that heavy metals with strong spin-orbit interaction, such as platinum, palladium, etc, are indispensable for achieving high spin-torque generation efficiency for the practical applications. For the first time, Ando group in Keio university has discovered that naturally oxidized copper can achieve a spin-torque generation efficiency as high as platinum. This finding opens a novel route for fabricating spintronic devices without using costly heavy metals and prompt the practical applications of spintronics technology.
Research Area “Innovative Nano-electronics through Interdisciplinary Collaboration among Material, Device and System Layers”
Research Theme “Creation of energy-saving nano electronic device based on spin Hall engineering”
Hongyu An, Yuito Kageyama, Yusuke Kanno, Nagisa Enishi and Kazuya Ando. “Spin-torque generator engineered by natural oxidation of Cu”. Nature Communications, Published online 11 October 2016, doi: 10.1038/ncomms13069.
Kazuya Ando, Ph.D.
Associate Professor, Department of Applied Physics and Physico-Informatics, Keio University
Sofia Saori Suzuki
Green Innovation Group, Department of Innovation Research, JST