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Probing Dy3+ magnetic moments in multiferroic perovskite DyMnO3 by optical spectroscopy

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arxiv 1611.04024 v1 pith:UG2F62FO submitted 2016-11-12 cond-mat.str-el

Probing Dy3+ magnetic moments in multiferroic perovskite DyMnO3 by optical spectroscopy

M.A. Kashchenko , S.A. Klimin , A. M. Balbashov , M.N. Popova This is my paper
classification cond-mat.str-el
keywords dymno3magneticdeltadysprosiumexperimentalperovskiteanalysingbelow
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We present a detailed temperature-dependent spectroscopic study of DyMnO3 single crystals with distorted perovskite structure. Energies of 36 crystal-field levels of Dy3+ in paramagnetic DyMnO3 were determined. The Dy3+ ground Kramers doublet does not split at T_N^Mn = 39 K and splits below Tlock = 18 K. The splitting grows fast at temperatures near T_N^Dy = 6.5 K and reaches {\Delta}0 = 11 cm-1 at 4 K. Using the experimental temperature dependence {\Delta}0(T), we calculate the dysprosium magnetic moment mDy(T) and the dysprosium contribution into specific heat and magnetic susceptibility. Analysing all the experimental data, we conclude that the Dy-Mn interaction is of the Dzyaloshinskii-Moriya type.

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