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Magneto-Strain Effect in Double-Layer Film Systems

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Author(s): Z.M. Makukha | S.I. Protsenko | L.V. Odnodvorets | I.Yu. Protsenko

Journal: Journal of Nano- and Electronic Physics
ISSN 2077-6772

Volume: 4;
Issue: 2;
Start page: 02043-1;
Date: 2012;
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Keywords: Longitudinal strain coefficient | Magneto-strain effect | Magnetic coefficient of the resistivity | Magnetic coefficient of the gauge facto

ABSTRACT
For the first time a theoretical study of magnetodeformation effect (MSE) in double-layer film materials is presented, taking into account the previous results obtained for single-layer films. When creating the elementary theory one derives the well-known coefficient for longitudinal strain coefficient (SC, ) for a double-layer film system of the type, “biplate”, without taking into account the possible processes of mutual diffusion of atoms. The MSE is quantified by the magnetic coefficient of the SC B  (1/)(/B), which describes the change of the film’s electrical resistance under its deformation in the external magnetic field. In the finite ratio for MSE, considered by the appropriate index for three possible orientations of the magnetic field relative to the direction of the flow of electric current (which coincides with direction of the longitudinal SC) the right-hand-side consists of the following values: R,  (resistivity), B (magnetic coefficient of resistivity) and second-order partial derivative  with respect to strain and magnetic field. The latter is not calculated from the first principles but is measured experimentally. Analyzing the ratio for the limiting cases for B, when d1 >> d2 and d1 
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