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The role of interfaces on the magnetic behavior of granular CuFeCo alloys
Author(s) -
Ghafari M.,
Volland A.,
Hahn H.
Publication year - 2005
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200520057
Subject(s) - giant magnetoresistance , tetragonal crystal system , materials science , condensed matter physics , spectroscopy , magnetoresistance , scattering , electron , squid , matrix (chemical analysis) , mössbauer spectroscopy , scanning electron microscope , chemistry , composite material , crystallography , magnetic field , physics , optics , crystal structure , ecology , quantum mechanics , biology
Granular thin films of face centered tetragonal (fct) FeCo‐clusters in a γ‐CuCo matrix show a giant magneto resistance effect. Cu 100– x (Fe 50 Co 50 ) x samples with 63 ≤ x ≤ 88 were examined using Mössbauer Spectroscopy, electron microscopy, Magnetoresistance, SQUID and Rutherford Backscattering Spectroscopy. In ultrafine particles with fct‐FeCo imbedded in a CuCo matrix the giant magneto resistance effect is strongly correlated to the ratio of interface/bulk. The magnetic interfaces form an additional scattering centere for the electrons which causes an increase of the GMR effect. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim )