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 language | English |
|---|---|
| Article number | 024006-1 |
| Journal | journal of the physical society of japan |
| Volume | 88 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Jan 1 2019 |
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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 journal › Article
}
TY - JOUR
T1 - Self-organized criticality of domain walls and magnetization curve
AU - Sakaguchi, Hidetsugu
AU - Zhao, Yue
PY - 2019/1/1
Y1 - 2019/1/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85060536547&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85060536547&partnerID=8YFLogxK
U2 - 10.7566/JPSJ.88.024006
DO - 10.7566/JPSJ.88.024006
M3 - Article
VL - 88
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 2
M1 - 024006-1
ER -