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Quantum Chemistry

Bose condensation and spin superfluidity of magnons in a perpendicularly magnetized film of yttrium iron garnet

arXiv
Authors: P. M. Vetoshko, G. A. Knyazev, A. N. Kuzmichev, A. A. Holin, V. I. Belotelov, Yu. M. Bunkov

Year

2020

Paper ID

20400

Status

Preprint

Abstract Read

~2 min

Abstract Words

110

Citations

N/A

Abstract

The formation of a Bose condensate of magnons in a perpendicularly magnetized film of yttrium iron garnet under radio-frequency pumping in a strip line is studied experimentally. The characteristics of nonlinear magnetic resonance and the spatial distribution of the Bose condensate of magnons in the magnetic field gradient are investigated. In these experiments, the Bosonic system of magnons behaves similarly to the Bose condensate of magnons in the antiferromagnetic superfluid 3He-B, which was studied in detail earlier. Magnonic BEC forms a coherently precessing state with the properties of magnonic superfluidity. Its stability is determined by the repulsive potential between excited magnons, which compensates for the inhomogeneity of the magnetic field.

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  • The formation of a Bose condensate of magnons in a perpendicularly magnetized film of yttrium iron garnet under radio-frequency pumping in a strip line is studied experimentally.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2009.12595 [2] arXiv https://arxiv.org/abs/2009.12595 [3] Publisher https://arxiv.org/abs/2009.12595

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