High-resolution spectroscopy, crystal-field calculations, and quadrupole helix chirality of DyFe3(BO3)4
1 Institute for Spectroscopy RAS, 142190 Troitsk, Moscow, Russia
2 Kazan Federal University, 420008 Kazan, Russia
3 Department of Physics, New Jersey Institute of Technology, NJ 07102 Newyark, USA
4 Kirensky Institute of Physics, Siberian Branch of RAS, 660036 Krasnoyarsk, Russia
* Corresponding author: email@example.com
Published online: 13 December 2016
High-resolution polarized transmission spectra of DyFe3(BO3)4 single crystals were investigated in broad spectral (10-23000 cm−1) and temperature (3.5-300 K) ranges. Energies of the dysprosium levels in the paramagnetic and antiferromagnetic phases were determined. On the basis of these data and preliminary calculations in the frameworks of the exchange-charge model, we determined the crystal-field and Dy-Fe exchange interaction parameters of the Dy3+ ions at sites with the point C2 symmetry corresponding to the enantiomorphic P3121 and P3221 space groups. The values of electronic quadrupole moments of the Dy3+ ions were calculated, which enabled us to interpret results of the work [Usui et al., Nature Mater. 13, 611 (2014)] on the observation of domains of different quadrupole chirality in DyFe3(BO3)4.
© The Authors, published by EDP Sciences, 2017
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