Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
87 (2000), S. 4786-4788
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Measurements of the initial magnetizing curve, the magnetizing remanence, the descending branch of the major hysteresis loop, and the demagnetizing remanence have been performed on a reentrant ferromagnet Fe0.65Ni0.23Cr0.12, at several temperatures in the vicinity of the postulated ferromagnetic-spin glass "reentrant transition." Henkel plots of the principal magnetizing and demagnetizing remanences show a systematic change in curvature with temperature, from a "high temperature" regime T≥8 K where the curvature is predominantly magnetizing-like to a "low temperature" regime T≤6 K where the curvature is purely demagnetizing-like. Numerical simulations based on a Preisach model which includes thermal fluctuations show that this behavior is consistent with a physical picture of coupled bistable subsystems with a temperature dependent distribution of interaction fields, which evolves with decreasing temperature from a regime dominated by long range ferromagnetic interactions to a regime in which the interaction fields fluctuate randomly about a zero mean. © 2000 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.373159
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