Bose—Einstein Condensation and Spin Superfluidity of Magnons in a Perpendicularly Magnetized Yttrium Iron Garnet Film

被引：0
作者：
P. M. Vetoshko
G. A. Knyazev
A. N. Kuzmichev
A. A. Kholin
V. I. Belotelov
Yu. M. Bunkov
机构：
[1] Russian Quantum Center,
[2] Vernadsky Crimean Federal University,undefined
[3] Moscow State University,undefined
来源：
JETP Letters | 2020年 / 112卷
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摘要：
The formation of a Bose—Einstein condensate of magnons in a perpendicularly magnetized iron yttrium garnet film under radio-frequency pumping in a stripline has been studied experimentally. The characteristics of the nonlinear magnetic resonance and spatial distribution of the Bose—Einstein condensate of magnons in the gradient of a magnetic field have been analyzed. In these experiments, the system of bosonic magnons behaves in much the same way as the Bose—Einstein condensate of magnons in antiferromagnetic superfluid 3He-B, which was previously studied in detail. The Bose—Einstein condensate of magnons forms a coherently precessing state having the properties of magnon superfluidity. Its stability is determined by the repulsion potential between excited magnons, which compensates the inhomogeneity of the magnetic field.
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页码：299 / 304
页数：5
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