P. M. Vetoshko, G. A. Knyazev, A. N. Kuzmichev, A. A. Holin, V. I. Belotelov, Yu. M. Bunkov
Published 2020-09-26Version 1
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.
Comments: 5 pages, 4 figures
Increased Gilbert damping in Yttrium Iron Garnet by low temperature vacuum annealing
Bose condensation of direct excitons in an off-resonant cavity at elevated temperatures
Spin currents, spin torques, and the concept of spin superfluidity
![QR code for arXiv:2009.12595 [cond-mat.mes-hall]](http://oss.arxitics.com/images/favicon.svg)