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Nanocomposite with Non-Spherical Granules – Logarithmic Field Dependence of Giant Magnetoresistance

Published online by Cambridge University Press:  21 March 2011

E. Meilikhov  and
B. Raquet
E. Meilikhov
Affiliation:
Russian Research Center «Kurchatov Institute», 123182 Moscow, Russia
B. Raquet
Affiliation:
Laboratoire de Physique de la Matière Condensée de Toulouse, Av. de Rangueil, 31077 Toulouse, France
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Abstract

Magnetoresistance of the nanocomposite Fex(SiO2)1−x (x≍0.6) at high enough magnetic field is logarithmic function of the magnetic field. Such a dependence does not fall into the known theory of giant magnetoresistance of ferromagnetic nanocomposites. This paper examines the giant magnetoresistance of such a system in terms of a simple model where the non-ordinary quasi-logarithmic magnetic field dependence of nanocomposite magnetoresistance is related to the non-spherical granules' distribution over their shapes.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 674: Symposia T/U/V – Applications of Ferromagnetic and Optical Materials, Storage and Magnetoelectronics , 2001 , U5.7
Copyright
Copyright © Materials Research Society 2001

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References

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