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The Features of the Structure and Magnetic Properties of Co-SiO2, Co-Al2O3 Composite Films with Tunneling Magnetoresistance Effect

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Abstract:

In the present work, we have studied the structural, magnetic and magnetoresistive properties of Cox(SiO2)100-x and Cox(Al2O3)100-x composite thin films, obtained by magnetron co-sputtering of metallic and insulator targets. It was shown by transmission electron microscopy and by temperature and field dependences of the magnetization that the films have a fine granular structure. For a wide range of compositions an adequate description was possible in frame of the model of homogeneous non-interacting superparamagnetic hexagonal lattice Co particles. Magnetoresistive sensor prototypes were designed on the base of an optimized magnetoresistive Co50(Al2O3)50 composite films

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Periodical:

Solid State Phenomena (Volume 190)

Pages:

474-477

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.190.474

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Online since:

June 2012

Authors:

A.N. Gorkovenko, V.O. Vas’kovskiy, V.N. Lepalovskij, N.N. Shchegoleva

Keywords:

Composite Film, Granules of Co, Magnetoresistance, Sensor, Superparamagnetism

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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