Spin Filter Based on EuO Monoxide
https://doi.org/10.32603/1993-8985-2018-21-2-55-59
Abstract
The basis of spin filter operation is the possibility to obtain different population of states with spins up and down for free electrons. However, in a magnetic macroscopic field, scattering by heavy atoms reduces their population density by 106 times. To obtain the maximum possible degree of spin polarization it is proposed to use ferromagnetic EuO in semiconductor superlattices, e. g. EuO–SrO. The article substantiates the creation of a spin filter based on a superlattice composed of SrO and EuO nanolayers. The scheme of ferromagnetic semiconductor EuO energy levels is demonstrated as well as splitting of 5d EuO levels by crystal field. The position of 4f 7-multiplet and the energy of formation of triplet exciton are determined.
About the Authors
Yu. F. Golovnev
Tula State Lev Tolstoy Pedagogical University
Russian Federation
Russian Federation
Yury F. Golovnev – D.Sc. in Physics and Mathematics, Professor of the Department of General and Theoretical Physics
125, Lenin Pr., 300026, Tula, Russia
D. A. Nurguleev
Tula State Lev Tolstoy Pedagogical University
Russian Federation
Russian Federation
Damir A. Nurguleev – Ph.D. in Physics and Mathematics, Associate Professor of the Department of General and Theoretical Physics
125, Lenin Pr., 300026, Tula, Russia
References
1. Gerlach, W., Stern, O. Der experimentelle. Nachweis des magnetischen Moments des Silberatoms. Zeitschrift für Physik. 1921, no. 8, pp. 110–111.
2. Mott N. F., Massey H. S. W. The Theory of Atomic Collisions. 3rd ed. Oxford, Clarendon Press, 1969, 858 p.
3. Kessler J. Polarized Electrons. 2d ed. Berlin, Springer, 1985, 299 p.
4. Klavsyuk A. L., Saletskii A. M. Formation and Properties of Metallic Atomic Contacts. Physics-Uspekhi [Advances in Physical Sciences]. 2015, vol. 185, no. 10, pp. 1009 – 1030. (In Russian)
5. Redkozemel'nye poluprovodniki [Rare Earth Semiconductors]. Ed. by P. Zhuze, I. A. Smirnov. Moscow, Nauka, 1977, 205 p. (In Russian)
6. Bamburov V. G., Borukhovich A. S. Monooksid evropiya dlya spintroniki [Europium Monoxide for Spintronics]. SPb, Lan', 2015, 96 p. (In Russian)
7. Methfessel S., Mattis D. C. Magnetic Semiconductors. Berlin: Springer, 1968, 173 p.
8. Samokhvalov A. A., Loshkareva N. N. Tezisy 8-i Ural'skoi konf. po spektroskopii [Theses of the 8th Ural Conf. on Spectroscopy]. 19–21 May 1975. Sverdlovsk, UNTs AN SSSR, 1975, 118 p. (In Russian)
Review
For citations:
Golovnev Yu.F., Nurguleev D.A. Spin Filter Based on EuO Monoxide. Journal of the Russian Universities. Radioelectronics. 2018;(2):55-59. (In Russ.) https://doi.org/10.32603/1993-8985-2018-21-2-55-59
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