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

✍ Scribed by Ghafari, M. ;Volland, A. ;Hahn, H.

• Book ID: 105363277
• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 184 KB
• Volume: 202
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200520057

✦ Synopsis

Abstract

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 )