Phase transitions and exchange interactions in the SmCr3(BO3)4 crystal

E.A. Dobretsova; K.N. Boldyrev; M.N. Popova; S.Yu. Gavrilkin; A.A. Mukhin; V.Yu. Ivanov; V.V. Mal’tsev; N.I. Leonyuk; B.Z. Malkin

doi:10.1051/epjconf/201713202008

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Volume 132 (2017)

EPJ Web Conf., 132 (2017) 02008

Abstract

Open Access

Issue		EPJ Web Conf. Volume 132, 2017 XXV-th Congress on Spectroscopy


Article Number		02008
Number of page(s)		2
Section		Oral talks
DOI		https://doi.org/10.1051/epjconf/201713202008
Published online		13 December 2016

EPJ Web of Conferences 132, 02008 (2017)
https://doi.org/10.1051/epjconf/201713202008

Phase transitions and exchange interactions in the SmCr₃(BO₃)₄ crystal

E.A. Dobretsova¹^,2^*, K.N. Boldyrev¹, M.N. Popova¹, S.Yu. Gavrilkin², A.A. Mukhin³, V.Yu. Ivanov³, V.V. Mal’tsev⁴, N.I. Leonyuk⁴ and B.Z. Malkin⁵

¹ Institute for Spectroscopy RAS, 108480 Troitsk, Moscow, Russia
² P.N. Lebedev Physical Institute RAS, 119991 Moscow, Russia
³ A.M. Prokhorov General Physics Institute RAS, 119991 Moscow, Russia
⁴ M.V. Lomonosov Moscow State University, 119991 Moscow, Russia
⁵ Kazan Federal University, 420008 Kazan, Russia

^* Corresponding author: elenadobretsova89@gmail.com

Published online: 13 December 2016

Abstract

Spectroscopic investigation and specific heat and magnetic susceptibility measurements of SmCr₃(BO₃)₄ crystals were performed. The spectra of the Sm³⁺ and Cr³⁺ ions in samarium chromium borate were calculated and parameters of the exchange interactions between the nearest chromium ions, chromium and samarium ions were determined. Three phase transitions were observed at the temperatures T₁ = 7.8 ± 0.5 К, T₂ = 6.7 ± 0.5 К, and T₃ = 4.3 ± 0.2 К, their nature is discussed. The crystal structures with different space symmetry groups R32 and C2/c were found to coexist in a SmCr₃(BO₃)₄ single crystal.

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