Bose—Einstein Condensation and Spin Superfluidity of Magnons in a Perpendicularly Magnetized Yttrium Iron Garnet Film
| Autor: | A. N. Kuzmichev, P. M. Vetoshko, A. A. Kholin, Yu. M. Bunkov, Vladimir I. Belotelov, G. A. Knyazev |
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| Rok vydání: | 2020 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics Physics and Astronomy (miscellaneous) Condensed matter physics Condensed Matter::Other Magnon Yttrium iron garnet 01 natural sciences 010305 fluids & plasmas law.invention Magnetic field Superfluidity Condensed Matter::Materials Science chemistry.chemical_compound chemistry law Excited state 0103 physical sciences Antiferromagnetism Condensed Matter::Strongly Correlated Electrons 010306 general physics Spin (physics) Bose–Einstein condensate |
| Zdroj: | JETP Letters. 112:299-304 |
| ISSN: | 1090-6487 0021-3640 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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