Self-organized criticality of domain walls and magnetization curve

Research output: Contribution to journalArticle

Abstract

We propose a kind of Ginzburg–Landau equation with quenched randomness. There is a pinning-depinning transition in the system when the external magnetic force is changed. The transition is self-organized when the external magnetic field is slowly changed under the demagnetizing effect. The total magnetization increases stepwise and the probability distribution of the increase in the total magnetization approximately obeys a power law. A hysteresis loop is obtained when the external magnetic field is changed reciprocally. In our model, the coercivity in the magnetization curve is expressed as the critical value for the pinning-depinning transition.

Original languageEnglish
Article number024006-1
Journaljournal of the physical society of japan
Volume88
Issue number2
DOIs
Publication statusPublished - Jan 1 2019

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domain wall
magnetization
curves
magnetic fields
coercivity
hysteresis

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Self-organized criticality of domain walls and magnetization curve. / Sakaguchi, Hidetsugu; Zhao, Yue.

In: journal of the physical society of japan, Vol. 88, No. 2, 024006-1, 01.01.2019.

Research output: Contribution to journalArticle

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