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This article is cited in 10 scientific papers (total in 10 papers)
Lattice dynamics
Lattice dynamics and electronic structure of cobalt–titanium spinel Co$_{2}$TiO$_{4}$
M. A. Prosnikova, A. D. Molchanovab, R. M. Dubrovina, K. N. Boldyrevb, A. N. Smirnovb, V. Yu. Davydova, A. M. Balbashovc, M. N. Popovab, R. V. Pisareva a Ioffe Institute, St. Petersburg
b Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow
c Moscow Power Engineering Institute
Abstract:
The results are presented on phonon excitations and the electronic structure of Co$_{2}$TiO$_{4}$ inverse spinel in which magnetically ordered cobalt ions Co$^{2+}$(3$d^{7}$) are in equal amounts in tetrahedral and octahedral sublattices below $T_{C}$ = 56 K. Single crystals are studied using optical reflection and absorption in a wide spectral range, Raman scattering, and dielectric spectroscopy methods. The dynamics of infrared and Raman-active phonons are studied, and the features associated with disordering in tetrahedral sites are detected. The $d$–$d$ electronic transitions recorded in the regions of 3800 and 6300 cm$^{-1}$ confirm the coordination features of Co$^{2+}$ ions. An increase in the permittivity in the temperature region below 130 K is detected.
Received: 08.06.2016
Citation:
M. A. Prosnikov, A. D. Molchanova, R. M. Dubrovin, K. N. Boldyrev, A. N. Smirnov, V. Yu. Davydov, A. M. Balbashov, M. N. Popova, R. V. Pisarev, “Lattice dynamics and electronic structure of cobalt–titanium spinel Co$_{2}$TiO$_{4}$”, Fizika Tverdogo Tela, 58:12 (2016), 2427–2433; Phys. Solid State, 58:12 (2016), 2516–2522
Linking options:
https://www.mathnet.ru/eng/ftt9754 https://www.mathnet.ru/eng/ftt/v58/i12/p2427
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