The role of interfaces on the magnetic behavior of granular CuFeCo alloys | Zendy

Ghafari M. | Zendy; Volland A. | Zendy; Hahn H. | Zendy

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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 )

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