Depinning transition of a domain wall in ferromagnetic films

Xi, Bin; Luo, Meng -Bo; Vinokur, Valerii M.; Hu, Xiao

doi:10.1038/srep14062

Title: Depinning transition of a domain wall in ferromagnetic films

Journal Article · Mon Sep 14 00:00:00 EDT 2015 · Scientific Reports

DOI:https://doi.org/10.1038/srep14062· OSTI ID:1221987

Xi, Bin ^[1]; Luo, Meng -Bo ^[2]; Vinokur, Valerii M. ^[3]; Hu, Xiao ^[1]

National Institute for Materials Science, Tsukuba (Japan)
Zhejiang Univ., Hangzhou (China)
Argonne National Lab. (ANL), Argonne, IL (United States)

We report first principle numerical study of domain wall (DW) depinning in two-dimensional magnetic film, which is modeled by 2D random-field Ising system with the dipole-dipole interaction. We observe nonconventional activation-type motion of DW and reveal the fractal structure of DW near the depinning transition. We determine scaling functions describing critical dynamics near the transition and obtain universal exponents establishing connection between thermal softening of pinning potential and critical dynamics. We observe that tuning the strength of the dipole-dipole interaction switches DW dynamics between two different universality classes, corresponding to two distinct dynamic regimes characterized by non-Arrhenius and conventional Arrhenius-type DW motions.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); Materials Sciences and Engineering Division

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1221987

Alternate ID(s):: OSTI ID: 1356362

Journal Information:: Scientific Reports, Vol. 5; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 6 works

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