INVESTIGADORES
KOLTON alejandro Benedykt
artículos
Título:
Universal dimensional crossover of domain wall dynamics in ferromagnetic films
Autor/es:
TORRES, W. SAVERO; PARDO, R. DÍAZ; BUSTINGORRY, S.; KOLTON, A. B.; LEMAÎTRE, A.; JEUDY, V.
Revista:
Physical Review B
Editorial:
AMER PHYSICAL SOC
Referencias:
Año: 2019 vol. 99
ISSN:
2469-9950
Resumen:
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.
