Non-stationary forced motion of domain walls in ferrimagnets close to the spin compensation point

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作者：
Ivanov, B.A.
Galkina, E.G.
Kireev, V.E.
Kulagin, N.E.
Ovcharov, R.V.
Khymyn, R.S.
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Fizika Nizkikh Temperatur | 2020年 / 46卷 / 08期
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Domain walls motion in ferrimagnets near the sublattices spin compensation point; where the effect of an exchange enhancement in the limit velocity of the wall is present; is studied theoretically. Nonlinear regimes of high-speed (till the limit speed) non-stationary wall motion are found. A region of the parameters of the magnet; where the collective variables approach is not valid; was found. In this region; the wall motion is accompanied by the periodic appearance of instability with respect to the increase in spin vibrations inside the domain wall. © 2020 Institute for Low Temperature Physics and Engineering. All rights reserved;
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页码：997 / 1007
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