Reversal-field memory in magnetic hysteresis

Details Reversal-field memory in magnetic hysteresis Reversal-field memory in magnetic hysteresis

2003-04-24

arxiv.org/abs/cond-mat/0304541v1

J. Appl. Phys. 93, 6617 (2003)

Physics

Condensed Matter

Disordered Systems and Neural Networks

3 pages, 5 figures. Proceedings of "2002 MMM Conferece", Tampa, FL

Scientific paper

10.1063/1.1557354

We report results demonstrating a singularity in the hysteresis of magnetic materials, the reversal-field memory effect. This effect creates a nonanalyticity in the magnetization curves at a particular point related to the history of the sample. The microscopic origin of the effect is associated with a local spin-reversal symmetry of the underlying Hamiltonian. We show that the presence or absence of reversal-field memory distinguishes two widely studied models of spin glasses (random magnets).

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