Spin waves can be used as new information careers in noble arithmetic elements like multi-input multi-output logic gates. To realize such devices, the use of volume spin wave is essential because of its high in-plane uniformity. (For other spin waves, the speed, wavelength and amplitude of spin waves are changed by propagation directions.) However, spin wave reflections at the waveguide edge have limited the stability of interference of volume spin waves. Researchers introduced a simple spin wave absorber, and successfully demonstrated robust fundamental 1/0 logic behavior first in the world. The large isolation value of 13.7 dB even in large magnetic field fluctuation over 30 Oe was obtained.
Research Area “Innovative Nano-electronics through Interdisciplinary Collaboration among Material, Device and System Layers”
Research Theme “Development of multi-input multi-output circuits using spin-wave phase interference in ultra-thin magnetic oxides”
Naoki Kanazawa, Taichi Goto, Koji Sekiguchi, Alexander B. Granovsky, Caroline A. Ross, Hiroyuki Takagi, Yuichi Nakamura and Mitsuteru Inoue. “Demonstration of a robust magnonic spin wave interferometer”. Scientific Reports, Published online 22 July 2016, doi: 10.1038/srep30268.
Taichi Goto, Ph.D.
Assistant Professor, Graduate School of Engineering, Toyohashi University of Technology
Sofia Saori Suzuki, Ph.D.
Green Innovation Group, Department of Innovation Research, JST