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
Royal Institute of Technology (KTH)
Chalmers, Physics, Theoretical Physics
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
Royal Institute of Technology (KTH)
CSIC-ICN Centro de investigacion en nanociencia y nanotecnologia CIN2
Johan Åkerman
University of Gothenburg
Royal Institute of Technology (KTH)
Applied Physics Letters
0003-6951 (ISSN) 1077-3118 (eISSN)
Vol. 97 20 202501Subject Categories
Other Engineering and Technologies
DOI
10.1063/1.3515907