Scattering of Spin-1/2 Particles in Heterostructures with Preferred Non-Complanar Directions

A.S. Sahakyan, R.M. Movsesyan, A.N. Kocharian
California State University, US

Keywords: spin polarization, spin scattering, spintronics, noncollinear polarization, colossal magnetoresistance, depolarization, spin valve

Summary:

Electron and neutron scattering on layered systems containing magnetic films of nano-thicknesses is investigated. The potential profiles of these systems have barriers, each of which is characterized by its magnetic vector which possess a longitudinal and a transversal components. The magnetic vectors, in general, are non-complanar due to the presence of transverse components and in the case of the polarized incident wave the third non-complanar direction can be defined by vector polarization. Consequently, the magnetic systems possessing two or more non-complanar directions can be useful in designing of spin valve and magneto-electronic devices. This circumstance leads to new degrees of freedom which make possible to tune the transmission and reflection coefficients and the polarization of the scattered waves, as well. Besides, the non-complanarity leads to a number of new effects such as interference of the partial scattered waves; tunability of transmission resonance and, in certain conditions, the non-reciprocity of transmission and reflection. For the electron systems the above-said effects must be manifested, in particular, in the conductance of the system and, consequently, they can be applied in designing of nano-element magnetic systems. These effects must clearly manifested in investigations of neutron scattering of at significantly large region of energy.