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![]() TSURKAN, Vladimir, KRUG VON NIDDA, Hans Albrecht, KRIMMEL, Alexander, LUNKENHEIMER, Peter, HEMBERGER, Joachim, RUDOLF, T, LOIDL, Alois. Ternary magnetic semiconductors: Recent developments in physics and technology. In: Physica Status Solidi (A) Applications and Materials Science, 2009, vol. 206, pp. 1082-1089. ISSN 1862-6300. DOI: https://doi.org/10.1002/pssa.200881137 |
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Physica Status Solidi (A) Applications and Materials Science | ||||||
Volumul 206 / 2009 / ISSN 1862-6300 | ||||||
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DOI:https://doi.org/10.1002/pssa.200881137 | ||||||
Pag. 1082-1089 | ||||||
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Recent results in physics and technology of ternary magnetic oxide and chalcogenide spinels AB 2X 4 (A = Fe, Mn, Co, Cd, Zn, Hg; B = Cr, Co, Sc, Al; X = O, S, Se) are reviewed. Us-ing magnetic susceptibility, specific heat, thermal expansion, electron-spin resonance, neutron diffraction, broad-band di-electric spectroscopy, and infrared optical spectroscopy, the spin, charge, orbital, and lattice correlations in these com-pounds were investigated. The novel magnetic ground states, e.g., spin liquid, spin-orbital liquid, and orbital glass, and in triguing effects, like colossal magnetocapacitive coupling, negative thermal expansion, and spin-driven Jahn-Teller structural transformations were revealed. In considering the origin of these phenomena, the concept of geometrical and bond frustration is explored. It relates the interplay of charge, spin, and orbital degrees of freedom with the inherent topo-logical frustration and competing exchange interactions be-tween the magnetic ions. |
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Cuvinte-cheie Chromium, infrared spectroscopy, Liquids, Magnetic semiconductors, magnetic susceptibility, magnetism, manganese, Manganese compounds, Mercury (metal), Scandium, Semiconducting cadmium compounds, Semiconducting selenium compounds, Spin dynamics, Spin glass, Thermal expansion, thermal stress, Zinc |
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