Thermoreflectance of single-crystal HgCr2Se4 near the ferromagnetic-to-paramagnetic phase transition |
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| Authors: | M Iliev T Arai |
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| Institution: | Faculty of Physics, University of Sofia, 1126 Sofia, Bulgaria;Max-Planck-Institut für Festkörperforschung, 7 Stuttgart 80, FRG;Institute of Applied Physics, University of Tsukuba, Japan 300-31 |
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| Abstract: | The thermoreflectance of the ferromagnetic semiconductor HgCr2Se4 (Tc = 106 K) has been measured between 45 and 340 K in the photon energy range from 1.7 to 2.8 eV. The spectral line shape and the signal intensity behave critically near the magnetic phase transition. The optical transitions and the effect of magnetic ordering are discussed. |
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