Crossed-Ratchet Effects for Magnetic Domain Wall Motion

A. Pérez-Junquera, V. I. Marconi, A. B. Kolton, L. M. Álvarez-Prado, Y. Souche, A. Alija, M. Vélez, J. V. Anguita, J. M. Alameda, J. I. Martín, J. M. R. Parrondo
2008 Physical Review Letters  
We study both experimentally and theoretically the driven motion of domain walls in extended amorphous magnetic films patterned with a periodic array of asymmetric holes. We find two crossed ratchet effects of opposite sign that change the preferred sense for domain wall propagation, depending on whether a flat or a kinked wall is moving. By solving numerically a simple ϕ^4-model we show that the essential physical ingredients for this effect are quite generic and could be realized in other
more » ... rimental systems involving elastic interfaces moving in multidimensional ratchet potentials.
doi:10.1103/physrevlett.100.037203 pmid:18233032 fatcat:tovfxkpq4zgzlf22oxbfh7z4zu