Crossed ratchet effects on magnetic domain walls: geometry and transverse field effects

A Alija (1) , A Hierro-Rodríguez (1) , A Pérez-Junquera (1) , Jm Alameda (1) , Ji Martín (1) , M Vélez (1)

1 Dept. Física

Domain wall propagation across a 2D array of asymmetric holes is strongly dependent on domain wall configuration: i.e. on whether the wall is flat or kinked. This results in interesting crossed ratchet and asymmetric accommodation effects that have been studied as a function of geometry and transverse field. Micromagnetic simulations have shown that the observation of crossed ratchet effects is easier for arrow than for triangular holes due to a larger field range in which kink propagation is the preferred mode for domain wall motion. Also, it has been found that dc transverse fields can produce a significant enhancement of the easy axis asymmetric accommodation and, also, that ac transverse fields can be rectified by the crossed ratchet potential.

Mots clés: Physical Sciences

A Alija, A Hierro-Rodríguez, A Pérez-Junquera, Jm Alameda, Ji Martín, et al.. Crossed ratchet effects on magnetic domain walls: geometry and transverse field effects. Journal of Physics D: Applied Physics, 2011, 44 (32), pp.325002. ⟨10.1088/0022-3727/44/32/325002⟩. ⟨hal-00642371⟩