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Article
Optical properties of ZnCr2Se4
We studied the optical properties of antiferromagnetic ZnCr2Se4 by infrared spectroscopy up to 28,000 cm-1 and for temperatures from 5 to 295 K. At the magnetic phase transition at 21 K, one of the four phonon mo...
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Article
Far-infrared optical excitations in multiferroic TbMnO3
We provide a detailed study of the reflectivity of multiferroic TbMnO3 for wave numbers from 40 cm-1 to 1000 cm-1 and temperatures 5 K < T < 300 K. Excitations are studied for polarization directions E || a, the ...
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Article
Spin-phonon coupling in highly correlated transition-metal monoxides
We report on the optical response of the highly correlated transition-metal monoxides MnO, FeO, CoO and NiO in the far-infrared regime. The main focus is put on spin-phonon coupling effects, which are found t...
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Article
Physical properties of FeSe0.5Te0.5 single crystals grown under different conditions
We report on structural, magnetic, conductivity, and thermodynamic studies of FeSe0.5Te0.5 single crystals grown by self-flux and Bridgman methods. The lowest values of the susceptibility in the normal state, th...
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Article
Wüstite: electric, thermodynamic and optical properties of FeO
We report on a systematic optical investigation of wüstite. In addition, the sample under consideration, Fe0.93O, has been characterized in detail by electrical transport, dielectric, magnetic and thermodynamic m...