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Optical absorption in cobalt-containing single-crystal epitaxial films of gadolinium gallium garnets |
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| Authors: | V. V. Randoshkin N. V. Vasil’eva V. G. Plotnichenko Yu. N. Pyrkov A. M. Saletskii N. N. Sysoev A. M. Galkin V. N. Dudorov |
| Affiliation: | (1) Joint Laboratory of Magnetooptoelectronics, Institute of General Physics, Russian Academy of Sciences, Mordovian State University, Bol’shevistkaya ul. 68, Saransk, 430000, Russia;(2) Institute of General Physics, Russian Academy of Sciences, ul. Vavilova 38, Moscow, 119991, Russia;(3) Research Center of Fiber Optics, Institute of General Physics, Russian Academy of Sciences, ul. Vavilova 38, Moscow, 119991, Russia;(4) Moscow State University, Vorob’evy gory, Moscow, 119899, Russia |
| Abstract: | Cobalt-containing single-crystal garnet films are grown by liquid-phase epitaxy from supercooled PbO-B2O3-and Bi2O3-B2O3-based solution melts on Gd3Ga5O12 substrates. It is shown that cobalt in the films is in a trivalent state. Upon introduction of GeO2 into the initial solution melt, cobalt transforms into a bivalent state. It is revealed that the absorption spectrum of the grown films exhibits two broad bands in the wavelength ranges 450–800 and 900–1800 nm. Each of these bands contains three components. The spin-orbit splitting of the observed bands is determined. |
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