Local Optimization For Simulating Hysteretic Behavior Of Exchange Coupled Magnetic Systems

PROCEEDINGS OF THE 33RD SOUTHEASTERN SYMPOSIUM ON SYSTEM THEORY（2001）

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Abstract

We discuss several kinds of local optimization methods for simulating hysteretic behavior of magnetic systems. Through minimization of system's total free energy over local domains by such techniques, quasi-static magnetization curves and torque curves can be captured. This approach can be applied to exchange coupled multilayer thin films used in GMR read heads for ultrahigh density magnetic data storage.

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Key words

magnetic anisotropy,thin film,free energy,magnetic hysteresis,couplings,data storage,nonlinear programming,genetic algorithms,torque,simulated annealing,magnetic domains,giant magnetoresistance,minimisation,magnetization

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