Open AccessMagnetic vortex chirality determination via local hysteresis loops measurements with magnetic force microscopy
Author(s) -
M. Coı̈sson,
Gabriele Barrera,
Federica Celegato,
A. Manzin,
F. Vinai,
P. Tiberto
Publication year - 2016
Publication title -
scientific reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.24
H-Index - 213
ISSN - 2045-2322
DOI - 10.1038/srep29904
Subject(s) - chirality (physics) , hysteresis , vortex , nucleation , condensed matter physics , magnetic hysteresis , micromagnetics , magnetization , magnetic force microscope , square (algebra) , measure (data warehouse) , magnetic field , physics , materials science , mechanics , geometry , quantum mechanics , symmetry breaking , mathematics , thermodynamics , chiral symmetry breaking , database , computer science , nambu–jona lasinio model
Magnetic vortex chirality in patterned square dots has been investigated by means of a field-dependent magnetic force microscopy technique that allows to measure local hysteresis loops. The chirality affects the two loop branches independently, giving rise to curves that have different shapes and symmetries as a function of the details of the magnetisation reversal process in the square dot, that is studied both experimentally and through micromagnetic simulations. The tip-sample interaction is taken into account numerically, and exploited experimentally, to influence the side of the square where nucleation of the vortex preferably occurs, therefore providing a way to both measure and drive chirality with the present technique.