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.
@article{arxiv.1706.10057,
title = {Spin-wave propagation in cubic anisotropic materials},
author = {Koji Sekiguchi and Seo-Won Lee and Hiroaki Sukegawa and Nana Sato and Se-Hyeok Oh and Robert D. McMichael and Kyung-Jin Lee},
journal= {arXiv preprint arXiv:1706.10057},
year = {2017}
}