Universal dimensional crossover of domain wall dynamics in ferromagnetic films

W. Savero Torres; R. Diaz Pardo; S. Bustingorry; A. B. Kolton; A. Lemaître; V. Jeudy

doi:10.1103/PhysRevB.99.201201

Universal dimensional crossover of domain wall dynamics in ferromagnetic films

Statistical Mechanics 2019-05-15 v2 Materials Science

Authors: W. Savero Torres , R. Diaz Pardo , S. Bustingorry , A. B. Kolton , A. Lemaître , V. Jeudy

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Abstract

The magnetic domain wall motion driven by a magnetic field is studied in (Ga,Mn)As and (Ga,Mn)(As,P) films of different thicknesses. In the thermally activated creep regime, a kink in the velocity curves and a jump of the roughness exponent evidence a dimensional crossover in the domain wall dynamics. The measured values of the roughness exponent zeta_{1d} = 0.62 +/- 0.02 and zeta_{2d} = 0.45 +/- 0.04 are compatible with theoretical predictions for the motion of elastic line (d = 1) and surface (d = 2) in two and three dimensional media, respectively.

Keywords

domain wall dynamics ferromagnetic films dimensional crossover creep regime roughness exponent magnetic field driven motion

Cite

@article{arxiv.1811.10329,
  title  = {Universal dimensional crossover of domain wall dynamics in ferromagnetic films},
  author = {W. Savero Torres and R. Diaz Pardo and S. Bustingorry and A. B. Kolton and A. Lemaître and V. Jeudy},
  journal= {arXiv preprint arXiv:1811.10329},
  year   = {2019}
}

Universal dimensional crossover of domain wall dynamics in ferromagnetic films

Abstract

Keywords

Cite

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