First-order reversal curve analysis of graded anisotropy FePtCu films
Journal article, 2010
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 American Institute of Physics
Author
Valentina Bonanni
Chalmers, Physics, Theoretical Physics
Royal Institute of Technology (KTH)
Y. Fang
Royal Institute of Technology (KTH)
Randy K. Dumas
University of Gothenburg
C. Zha
Royal Institute of Technology (KTH)
Stefano Bonetti
Royal Institute of Technology (KTH)
Josep Nogues
Spanish National Research Council (CSIC)
Royal Institute of Technology (KTH)
Johan Åkerman
University of Gothenburg
Royal Institute of Technology (KTH)
Applied Physics Letters
0003-6951 (ISSN) 1077-3118 (eISSN)
Vol. 97 20 202501Subject Categories (SSIF 2011)
Other Engineering and Technologies
DOI
10.1063/1.3515907