Nonstationary forced motion of domain walls in ferrimagnets near the spin compensation point

• The motion of domain walls in ferrimagnets near the sublattice spin compensation point is studied theoretically, when there is an exchange enhancement in the limiting velocity of the wall. Nonlinear regimes of high-velocity nonstationary wall motion are found. A magnet parameter region in which the collective variable approach is invalid, is detected. In this region, the wall motion is accompanied by the periodic appearance of instability with respect to the increase in spin oscillations inside the domain wall.

Ämnesord

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

Nyckelord

domain wall

ferrimagnet

spin compensation point

Walker solution

phenomenological description

relaxation processes

soliton relaxation

dynamic equations

crystal symmetry

antiferromagnets

momentum

waves

terms

Physics

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