Abstract
A g and B 2g Raman active modes in NdMnO 3 single crystals, grown by flux and floating zone techniques, have been studied in the temperature range from 4.2 to 300 K. Similar to orthorhombic LaMnO 3, the NdMnO 3 structure distorted by a static Jahn–Teller effect is consistent with the D 2h 16 space group. The observed phonon frequencies, intensities and bandwidths are influenced by the temperature evolution of the Mn 3+ magnetic sublattice and, particularly, the most intense B 2g mode (∼601 cm −1) softens below T N∼75 K following the paramagnetic to canted-antiferromagnetic phase transition.
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