Boundary resistance in magnetic multilayers

Details Boundary resistance in magnetic multilayers Boundary resistance in magnetic multilayers

2006-02-03

arxiv.org/abs/cond-mat/0602070v1

published in J. Phys.: Condens. Matter. 18, 1545-1552 (2006)

Physics

Condensed Matter

Other Condensed Matter

8 pages, 3 figures, designed using IOPART style

Scientific paper

10.1088/0953-8984/18/5/006

Quasiclassical boundary conditions for electrochemical potentials at the interface between diffusive ferromagnetic and non-magnetic metals are derived for the first time. An expression for the boundary resistance accurately accounts for the momentum conservation law as well as essential gradients of the chemical potentials. Conditions are established at which spin-asymmetry of the boundary resistance has positive or negative sign. Dependence of the spin asymmetry and the absolute value of the boundary resistance on the exchange splitting of the conduction band opens up new possibility to estimate spin polarization of the conduction band of ferromagnetic metals. Consistency of the theory is checked on existing experimental data.

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