Fingerprinting hysteresis

We test the predictive power of first-order reversal curve (FORC) diagrams using simulations of random magnets. In particular, we compute a histogram of the switching fields of the underlying microscopic switching units along the major hysteresis loop, and compare to the corresponding FORC diagram....

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2004, Vol.343 (1), p.10-14
Main Authors: Katzgraber, Helmut G., Friedman, Gary, Zimányi, G.T.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Domain effects, magnetization curves, and hysteresis
Exact sciences and technology
First-order reversal curves
General theory and models of magnetic ordering
Magnetic annealing and temperature-hysteresis effects
Magnetic properties and materials
Physics
Spin glasses
Spin-glass and other random models
Switching-field histograms
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Summary:We test the predictive power of first-order reversal curve (FORC) diagrams using simulations of random magnets. In particular, we compute a histogram of the switching fields of the underlying microscopic switching units along the major hysteresis loop, and compare to the corresponding FORC diagram. We find qualitative agreement between the switching-field histogram and the FORC diagram, yet differences are noticeable. We discuss possible sources for these differences and present results for frustrated systems where the discrepancies are more pronounced.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2003.08.051