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First-order reversal curve analysis of graded anisotropy FePtCu films Bonanni, Valentina Fang, Yeyu Dumas, Randy K. Zha, Chaolin Bonetti, Stefano Nogués, Josep Aakerman, Johan American Physical Society Física aplicada This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The reversal mechanisms of graded anisotropy FePtCu films have been investigated by alternating gradient magnetometer AGM and magneto-optical Kerr effect MOKE measurements with first-order reversal curve FORC techniques. The AGM-FORC analysis, which clearly shows the presence of soft and hard components, is unable to resolve how these phases are distributed throughout the film thickness. MOKE-FORC measurements, which preferentially probe the surface of the film, reveal that the soft components are indeed located toward the top surface. Combining AGM-FORC with the inherent surface sensitivity of MOKE-FORC analysis allows for a comprehensive analysis of heterogeneous systems such as graded materials. 2010 Article Applied physics letters ; Vol. 97, Issue 20 (November 2010), p. 202501-202503 open access Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets. https://rightsstatements.org/vocab/InC/1.0/