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IOP Publishing, Journal of Physics D: Applied Physics, 21(44), p. 215002, 2011

DOI: 10.1088/0022-3727/44/21/215002

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Fast propagation of weakly pinned domain walls and current-assisted magnetization reversal in He+-irradiated Pt/Co/Pt nanotracks

Journal article published in 2011 by M. Cormier, A. Mougin ORCID, J. Ferré, J.-P. Jamet, R. Weil, J. Fassbender ORCID, V. Baltz, B. Rodmacq
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This paper is available in a repository.

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Abstract

Magnetic-domain-wall propagation is experimentally studied in nanotracks etched in ultrathin Pt/Co/Pt films with out-of-plane magnetic anisotropy, where pinning has been artificially reduced by low-dose He+-irradiation. Fast domain-wall propagation is demonstrated in such tracks under low magnetic fields, not greater than the fields necessary to make a domain wall propagate in the He+-irradiated plain films before patterning. A strong further enhancement of the track-magnetization reversal speed is obtained thanks to a Joule-heating-induced thermomagnetic effect, by applying magnetic-field and electrical-current pulses simultaneously to the track.