Open AccessMicromagnetic analysis of geometrically controlled current-driven magnetization switching
Author(s) -
Ó. Alejos,
V. Raposo,
Maria Auxiliadora Hernandez,
Luis Sánchez-Tejerina,
Simone Moretti,
E. Martı́nez
Publication year - 2017
Publication title -
aip advances
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 58
ISSN - 2158-3226
DOI - 10.1063/1.4973749
Subject(s) - magnetization , domain wall (magnetism) , micromagnetics , condensed matter physics , magnetization dynamics , current (fluid) , ferromagnetism , magnetic domain , nucleation , polarity (international relations) , single domain , materials science , amplitude , physics , magnetic field , chemistry , optics , thermodynamics , biochemistry , quantum mechanics , cell
The magnetization dynamics induced by current pulses in a pair of two “S-shaped” ferromagnetic elements, each one consisting on two oppositely tilted tapered spikes at the ends of a straight section, is theoretically studied by means of micromagnetic simulations. Our results indicate that the magnetization reversal is triggered by thermal activation, which assists the current-induced domain nucleation and the propagation of domain walls. The detailed analysis of the magnetization dynamics reveals that the magnetization switching is only achieved when a single domain wall is nucleated in the correct corner of the element. In agreement with recent experimental studies, the switching is purely dictated by the shape, being independent of the current polarity. The statistical study points out that successful switching is only achieved within a narrow range of the current pulse amplitudes
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