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Photonic effect in ferromagnetic nano-films of Heysler alloy
|Yuri A. Kuzavko|
The Polesie Agrarian Ecological Institute of the National Academy of Science of Belarus (PAEI), Brest 224000, Belarus
The idea of a spintronic analogue of a field-effect transistors, spoken in  and based on the control of spin polarization of a charge carriers with use of a spin-orbit interaction with outer electric field is still not realized experimentally. The same is true for idea of a polarization transistor , the essence of which is in polarization magnetooptic bistability effect in magnetoordered films. Such effect, been found experimentally, would make it possible to realize binary logic in s- and p-polarization of a light beam (or even single photon) and to build quantum computer with colossal parallel information processing in perspective.
Nowadays there is a growth of interest to the only one known magnetoordered Heysler Ni2MnGa alloy, in which a shape memory effect as on temperature, so on outer magnetic field was reliably discovered. A 90 nm and 30 nm films of this substance were synthesized, i.e. ones containing only several tens of crystallographic cells in a specified direction. Here of Kerr’s and Faraday’s effects in films of Ni53Mn25Ga22, Ni2.18Mn0.82Ga are considered with combined magnetostructured phase transition with use of a scalar relativistic version of the tight-binding linear muffin-tin-orbital atomic-sphere approximation within the local-spin-density approximation. An outer magnetic film is deforming the film and consequently causing reallocation of a “down” and “up” spin polarized electrons on the film surface, influencing on photons polarization change as at photons reflection from a metal film, so at their transition through it. It seems that electrons spin overturn can cause amplification effect (transistor) of transformed light pulses.
Author is grateful for BRFFI-RFFI F04R-080 grant for partial financial support
 Datte S., Das B. Appe.Phys.Lott.1991.U.56.P.665
 Kuzavko Yu.A., Shavrov V.G. Digests of XII Soviet seminar “Novel magnetic materials for microelectronics” Novgorod, USSR, 1990 v.2. p.97
Presentation: Poster at E-MRS Fall Meeting 2007, Acta Materialia Gold Medal Workshop, by Yuri A. Kuzavko
See On-line Journal of E-MRS Fall Meeting 2007
Submitted: 2007-05-14 23:13 Revised: 2009-06-07 00:44