Microwave Directional Dichroism Resonant with Spin Excitations in the Polar Ferromagnet GaV_{4}S_{8}

Microwave Directional Dichroism Resonant with Spin Excitations in the Polar Ferromagnet GaV_{4}S_{8}

We have investigated the directional dichroism of magnetic resonance spectra in the polar ferromagnet GaV_{4}S_{8}. While four types of structural domains are energetically degenerated under a zero field, the magnetic resonance for each domain is well separated by applying magnetic fields due to uni...

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Veröffentlicht in:Physical review letters 2019-02, Vol.122 (5), p.057202-057202
Hauptverfasser: Okamura, Y, Seki, S, Bordács, S, Butykai, Á, Tsurkan, V, Kézsmárki, I, Tokura, Y
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container_issue 5
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container_title Physical review letters
container_volume 122
creator Okamura, Y
Seki, S
Bordács, S
Butykai, Á
Tsurkan, V
Kézsmárki, I
Tokura, Y
description We have investigated the directional dichroism of magnetic resonance spectra in the polar ferromagnet GaV_{4}S_{8}. While four types of structural domains are energetically degenerated under a zero field, the magnetic resonance for each domain is well separated by applying magnetic fields due to uniaxial magnetic anisotropy. Consequently, a directional dichroism as large as 20% is clearly observed without domain cancellation. The present observation therefore demonstrates that not only magnetoelectric monodomain crystals but also magnetoelectric multidomain specimens can be used to realize microwave (optical) diodes owing to the lack of inversion domains.
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title Microwave Directional Dichroism Resonant with Spin Excitations in the Polar Ferromagnet GaV_{4}S_{8}
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