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Fractal analysis of time‐resolved magnetic domain patterns in Co/Pd multilayer with varying number of repeats
Author(s) -
Kim DongHyun,
Cho YoonChul,
Choe SugBong,
Shin SungChul
Publication year - 2004
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200304608
Subject(s) - nucleation , fractal , domain (mathematical analysis) , fractal dimension , time domain , magnetometer , domain wall (magnetism) , materials science , time evolution , physics , condensed matter physics , mathematics , computer science , thermodynamics , mathematical analysis , magnetic field , magnetization , quantum mechanics , computer vision
We investigate the fractal behavior of magnetic domain together with analysis of dynamic reversal behavior in Co/Pd multilayer films prepared with different number of repeats n . We utilize a novel magneto‐optical microscope magnetometer technique to visualize the time‐resolved domain evolution patterns in these films. Quantitative analysis of the time‐resolved domain evolution patterns allows us to determine the fractal dimension D f and the reversal ratio V / R depending on n , where V / R represents the counterbalance between the wall‐motion speed V and the nucleation rate R . As n increases, domain shape becomes more ragged and complex and thus, D f increases. Interestingly enough, the change in D f clearly seems to be coupled to the change in V / R with varying n , which implies that the correlation between D f and V / R is mediated via the distributed defects. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)