Common universal behavior of magnetic domain walls driven by spin-polarized electrical current and magnetic field

ALBORNOZ, L.; JEUDY, V.; DIAZ PARDO, R.; LEMAÎTRE, A.; MOISAN, N.; CURIALE, J.

PHYSICAL REVIEW B

AMER PHYSICAL SOC

Lugar: New York; Año: 2019 vol. 100 p. 184420 - 184429

1098-0121

We explore the universal behaviors of a magnetic domain wall driven by the spin-transfer torque of an electrical current, in a ferromagnetic (Ga,Mn)(As,P) thin film with perpendicular magnetic anisotropy. For a current transverse to the domain wall, the dynamics of the thermally activated creep regime and the depinning transition are found to be compatible with a self-consistent universal description of magnetic-field-induced domain-wall dynamics. This common universal behavior, characteristic of the so-called quenched Edwards-Wilkinson universality class, is confirmed by an independent analysis of domain-wall roughness. Complementary investigations reveal the directional properties of interaction between current and domain walls which result in the instability of their transverse orientation.