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Spin-wave propagation in cubic anisotropy materials.

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 [1-3]. 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 anisotropy materials can enhance spin-wave signals by improving spin-wave amplitude as well as group velocity and attenuation length. Furthermore, 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.

SUBMITTER: Sekiguchi K

PROVIDER: S-EPMC5695715 | biostudies-other | 2017

REPOSITORIES: biostudies-other

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Spin-wave propagation in cubic anisotropy materials.

Sekiguchi Koji K Lee Seo-Won SW Sukegawa Hiroaki H Sato Nana N Oh Se-Hyeok SH McMichael R D RD Lee Kyung-Jin KJ

NPG Asia materials 20170630

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 [1-3]. 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 ...[more]

PMID: 29167703

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