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Publication Citation: Magneto-resistance based first order reversal curve analysis of magnetic tunnel junctions

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Author(s): Joshua M. Pomeroy; John Read; Theodore White; Holger Grube; Joseph E. Davies;
Title: Magneto-resistance based first order reversal curve analysis of magnetic tunnel junctions
Published: July 13, 2009
Abstract: First order reversal curve (FORC) analysis is successfully applied to magnetic tunnel junctions (MTJs) by using the junction magneto-resistance (MR) instead of the magnetization field (M). FORC analysis is conventionally applied to magnetization vs. applied magnetic field loops to determine the ensemble properties of many domain magnetic samples ranging from naturally occurring geological samples to exquisitely engineered materials for use in magnetic storage. By using the MTJ resistance to monitor domain switching, arbitrarily small samples can be studied, as well as actual functioning devices after lithographic patterning. Experimental data is presented from sub 0.01 mm2 MTJs that illustrates application of FORC analysis.
Citation: Applied Physics Letters
Volume: 95
Issue: 2
Pages: 3 pp.
Keywords: first order reversal curves, magnetic tunnel junctions, hysteresis
Research Areas: Magnetics