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arXiv · 1706.10057

Spin-wave propagation in cubic anisotropic materials

Koji Sekiguchi·Seo-Won Lee·Hiroaki Sukegawa·Nana Sato·Se-Hyeok Oh·Robert D. McMichael·Kyung-Jin Lee
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Abstract

The information carrier of modern technologies is the electron charge whose transport inevitably generates Joule heating. Spin-waves, the collective precessional motion of electron spins, do not involve moving charges and thus avoid Joule heating. In this respect, magnonic devices in which the information is carried by spin-waves attract interest for low-power computing. However implementation of magnonic devices for practical use suffers from low spin-wave signal and on/off ratio. Here we demonstrate that cubic anisotropic materials can enhance spin-wave signals by improving spin-wave amplitude as well as group velocity and attenuation length. Furthermore, cubic anisotropic 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 anisotropic materials will invigorate magnonics research towards wave-based functional devices.

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Koji Sekiguchi, Seo-Won Lee, Hiroaki Sukegawa, Nana Sato, Se-Hyeok Oh, Robert D. McMichael, Kyung-Jin Lee. 2017-06-30. Spin-wave propagation in cubic anisotropic materials. https://doi.org/10.1038/am.2017.87

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