Abstract
From topology of the order parameter of the magnon condensate observed in yttrium-iron-garnet (YIG) magnetic films one must not expect energetic barriers making spin supercurrents metastable. But we show that some barriers of dynamical origin are possible nevertheless until the gradient of the phase (angle of spin precession) does not exceed the critical value (analog of the Landau critical velocity in superfluids). On the other hand, recently published claims of experimental detection of spin superfluidity in YIG films and antiferromagnets are not justified, and spin superfluidity in magnetically ordered solids has not yet been experimentally confirmed.
Original language | English |
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Article number | 012116 |
Journal | Journal of Physics: Conference Series |
Volume | 969 |
Issue number | 1 |
DOIs | |
State | Published - 19 Apr 2018 |
Event | 28th International Conference on Low Temperature Physics, LT 2018 - Gothenburg, Sweden Duration: 9 Aug 2017 → 16 Aug 2017 |
Bibliographical note
Publisher Copyright:© Published under licence by IOP Publishing Ltd.