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Spin-wave propagation in cubic anisotropy materials

Published

Author(s)

Koji Sekiguchi, Seo-Won Lee, Hiroaki Sukegawa, Nana Sato, Se-Hyeok Oh, Robert McMichael, Kyung-Jin Lee

Abstract

The information carrier of modern technologies is the electron charge whose transport inevitably generates Joule heating. Spin-wave, the collective precessional motion of electron spins, does not involve moving charges and thus alleviates Joule heating [1-3]. In this respect, magnonic devices in which the information is carried by spin-waves attract an interest for low-power computing. However the implementation of magnonic devices for practical use suffers from low spin-wave signal and on/off ratio. Here we demonstrate that cubic anisotropy materials can enhance spin-wave signals by improving spin-wave amplitude as well as group velocity and attenuation length. Furthermore, the cubic anisotropy material shows an enhanced on/off ratio through a laterally localized edge mode, which closely mimics the gate-controlled conducting channel in traditional field-effect transistors. These attractive features of cubic anisotropy materials will invigorate magnonics research towards wave-based functional devices.
Citation
NPG Asia Materials
Volume
9
Issue
6

Keywords

nanomagnetics, spintronics, magnetic materials, spin waves, magnonics, ferromagnetism

Citation

Sekiguchi, K. , Lee, S. , Sukegawa, H. , Sato, N. , Oh, S. , McMichael, R. and Lee, K. (2017), Spin-wave propagation in cubic anisotropy materials, NPG Asia Materials, [online], https://doi.org/10.1038/am.2017.87, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=921506 (Accessed April 19, 2024)
Created June 29, 2017, Updated October 12, 2021