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A resistor network theory of the giant magnetoresistance in magnetic superlattices

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3 Author(s)
D. M. Edwards ; Dept. of Math., Imperial Coll., London, UK ; J. Mathon ; R. B. Muniz

An explanation of the giant magnetoresistance effect observed in some magnetic superlattices is given in terms of an equivalent network of resistors. The model leads to a simple analytic formula that relates the magnetoresistance to the spin-dependent electron mean-free paths and thickness of the magnetic and nonmagnetic layers in the superlattice. The formula is used to study the giant magnetoresistance of Co/Cu and Fe/Cr superlattices, and is also used to predict the most favorable values of parameters for a large magnetoresistance effect.

Published in:

IEEE Transactions on Magnetics  (Volume:27 ,  Issue: 4 )