Issue |
EPL
Volume 98, Number 3, May 2012
|
|
---|---|---|
Article Number | 36002 | |
Number of page(s) | 6 | |
Section | Condensed Matter: Structural, Mechanical and Thermal Properties | |
DOI | https://doi.org/10.1209/0295-5075/98/36002 | |
Published online | 04 May 2012 |
Creep motion of a domain wall in the two-dimensional random-field Ising model with a driving field
1
Department of Physics, Zhejiang University - Hangzhou 310027, PRC
2
Department of Physics, Hangzhou Normal University - Hangzhou 310036, PRC
Received:
2
February
2012
Accepted:
3
April
2012
With Monte Carlo simulations, we study the creep motion of a domain wall in the two-dimensional random-field Ising model with a driving field. We observe the nonlinear field-velocity relation, and determine the creep exponent μ. To further investigate the universality class of the creep motion, we also measure the roughness exponent ζ and energy barrier exponent ψ from the zero-field relaxation process. We find that all the exponents depend on the strength of disorder.
PACS: 64.60.Ht – Dynamic critical phenomena / 05.10.Ln – Monte Carlo methods / 75.60.Ch – Domain walls and domain structure
© EPLA, 2012
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