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Giánt Mr in Granular Systems Prepared by Melt-Spinning and Sputtering

Published online by Cambridge University Press:  03 September 2012

B. Dieny ,
S.R. Teixeira ,
B. Rodmacq ,
A. Chamberod ,
J.B. Genin ,
S. Auffret ,
P. Gerard ,
O. Redon ,
J. Pierre  and
R. Ferrer
...Show all authors
B. Dieny
Affiliation:
CEA/Département de Recherche Fondamentale sur la Matière Condensée, SP2M-MP, 85X, 38041 Grenoble Cedex, France.
S.R. Teixeira
Affiliation:
CEA/Département de Recherche Fondamentale sur la Matière Condensée, SP2M-MP, 85X, 38041 Grenoble Cedex, France.
B. Rodmacq
Affiliation:
CEA/Département de Recherche Fondamentale sur la Matière Condensée, SP2M-MP, 85X, 38041 Grenoble Cedex, France.
A. Chamberod
Affiliation:
CEA/Département de Recherche Fondamentale sur la Matière Condensée, SP2M-MP, 85X, 38041 Grenoble Cedex, France.
J.B. Genin
Affiliation:
CEA/Département de Recherche Fondamentale sur la Matière Condensée, SP2M-MP, 85X, 38041 Grenoble Cedex, France.
S. Auffret
Affiliation:
CEA/Département de Recherche Fondamentale sur la Matière Condensée, SP2M-MP, 85X, 38041 Grenoble Cedex, France.
P. Gerard
Affiliation:
CENG, LETI/MEM, 85X, 38041 Grenoble Cedex, France
O. Redon
Affiliation:
Laboratoire Louis Néel, CNRS, BP166X, 38042 Grenoble Cedex.G
J. Pierre
Affiliation:
Laboratoire Louis Néel, CNRS, BP166X, 38042 Grenoble Cedex.G
R. Ferrer
Affiliation:
Laboratoire Louis Néel, CNRS, BP166X, 38042 Grenoble Cedex.G
B. Barbara
Affiliation:
Laboratoire Louis Néel, CNRS, BP166X, 38042 Grenoble Cedex.G
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Abstract

Wc report the observation of giant magnctorcsistance in granular systems prepared by either Melt-spinning or sputtering. For Melt-spun CoxCu1-x alloys, with x varying between 5 and 30%, Magnctoresitancc amplitudes of 20% in 50 kOc at 5 K were obtained, similar to those reported for the same alloys prepared by sputtering. For sputtered (Ni80Fe20)xAg1-x alloys, three different contributions to the magnetorcsisiancc have been clearly identified: The spin-valve (or giant) Magnctorcsistance, scattering on magnetic fluctuations, and anisotropie Magnetorcsistancc. These three contributions have their own dependences on the size of the magnetic particles, on the degree of intermixing between NiFe and Ag, and on the temperature. In the third scries of samples, sputtered (Co70Fe30)xAg1-x, very large magnctorcsistance amplitude has been observed (AR/R as high as 20% at room temperature in 10 kOc and 60% at 10 K).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 313: Symposium Q1 – Magnetic Ultrathin Films, Multilayers and Surfaces/Magnetic Interfaces-Physics and Characterizations , 1993 , 399
Copyright
Copyright © Materials Research Society 1993

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References

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