Journal
PHYSICAL REVIEW B
Volume 99, Issue 20, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.99.201201
Keywords
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Funding
- French-Argentina project ECOS-Sud [A12E03]
- French projects DIM CNano IdF (Region Ile-de-France)
- Labex NanoSaclay [ANR-10-LABX-0035]
- French RENATECH network
- Mexican council CONACYT [449563]
- CONICET [PIP11220120100250CO]
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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.
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