On the possibility of magnetoresistance governed by light
Abstract
It has been shown that it is possibility to control magnetoresistance by light. The use of light-sensitive banana-shape molecules has been suggested as an engine for varying the thickness or spacer between the magnetic layers. The spacer is filled by a conducting polymer with copper-like conductivity (with inserted bent molecules), ensuring the proper interlayer exchange coupling, which is necessary for transition from a ferromagnetic to an anti-ferromagnetic ordering (and inverse) when the thickness of the spacer changes.
Supporting agencies: The work was supported by FTP “Scientific and Educational Human Resources for Innovation-Driven Russia” (contract 16.740.11.0030, grant 2012-1.2.2-12-000-1001-047), grant 11-08-00267 of RFBR and by Program of Development of Leading Russian Universities.
About the Author
I. Yu. Popov
St. Petersburg National Research University of Information Technologies,
Mechanics and Optics
Russian Federation
Russian Federation
49, Kronverkskiy, St. Petersburg, 197101.
References
1. P.Grünberg. Layered magnetic structures: facts, figures, future. J.Phys.: Condens. Matter., 13, P. 7691–7706 (2001).
2. L.V. Gortinskaya, I.Yu. Popov, E.S. Tesovskaya, V.M. Uzdin. Electronic transport in the multilayers with very thin magnetic layers. Physica E, 36, P. 12–16 (2007).
3. V.M. Uzdin, N.S. Yartseva, L. Adamowicz. Phase shift of exchange coupling oscilations in magnetic multilayers. J. Magn. Magn. Mater., 203, P.283–285 (1999).
4. S. Ostanin, V. M. Uzdin, C. Demangeat, J.M. Wills, M. Alouani and H. Dreysse. Effect of hydrogen on the interlayer exchange coupling in FeOV superlattices. Phys. Rev., B 61(7), P. 4870–4876 (2000).
5. K.Ichimura. Photoalignment of Liquid-Crystal Systems. Chem. Rev., 100, P. 1847–1874 (2000).
6. Y. L.Yu, T.Ikeda. Alignment modulation of azobenzene-containing liquid crystal systems by photochemical reactions. J. Photochem. Photobiol, C 5, P. 247–265 (2004).
7. T.Ikeda. Photomodulation of liquid crystal orientations for photonic applications. J. Mater. Chem., 13, P. 2037–2057 (2003).
8. P. M.Hogan, A. R.Tajbakhsh, E. M.Terentjev. UV manipulation of order and macroscopic shape in nematic elastomers. Phys. Rev. E., 65, P. 041720 (2002).
9. S.Kurihara, T.Ikeda, S.Tazuke, J. E.Seto. Isothermal phase transition of liquid crystals induced by photoisomerization of doped spiropyrans. J. Chem. Soc., Faraday Trans., 87, P. 3251–3254 (1991).
10. I.Cabrera, V.Krongauz. Dynamic ordering of aggregated mesomorphic macromolecules. Nature, 326, P. 582–585 (1987).
11. I.Cabrera, A.Dittrich, H.Ringsdorf. Thermally Irreversible Photochromic Liquid Crystal Polymers. Angew. Chem. Int. Ed. Engl. 30, P. 76–78 (1991).
12. K. M. Lee, D. H. Wang, H. Koerner, R. A. Vaia, L.-S. Tan, T. J.White. Enhancement of Photogenerated Mechanical Force in Azobenzene-Functionalized Polyimides. Angew. Chem., 124, P. 4193–4197 (2012).
13. D. H. Wang, K. M. Lee, Z. Yu, H. Koerner, R. A. Vaia, T. J.White, L.-S. Tan. Photomechanical Response of Glassy Azobenzene Polyimide Networks. Macromolecules, 44, P. 3840–3846 (2011).
14. M. Angelopoulos. In: Handbook of Conducting Polymers. eds. T.A.Skoteum, R.L.Elsenbaumer, J.R.Reynolds (Marcel Dekker, Inc. New York. 1998), p. 921.
15. L.-Yu. Wang, H.-Yi Tsai, H.-Ch. Lin. Novel Supramolecular Side-Chain Banana-Shaped Liquid Crystalline Polymers Containing Covalent- and Hydrogen-Bonded Bent Cores. Macromolecules, 43, P. 1277–1288 (2010).
Review
For citations:
Popov I.Yu. On the possibility of magnetoresistance governed by light. Nanosystems: Physics, Chemistry, Mathematics. 2013;4(6):795-799.
Views:
4
Email this article 