Synthesis of NdSc3(BO3)4 single crystals and study of its structure properties
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Author:
Evgeniy V. Eremin
Maxim S. Pavlovskiy
Irina A. Gudim
Vladislav, Temerov
Maxim, Molokeev
Nikita D. Andryushin
Evgeniy V. Bogdanov
Corporate Contributor:
Институт инженерной физики и радиоэлектроники
Базовая кафедра физики твердого тела и нанотехнологий
Date:
2020-07Journal Name:
Journal of Alloys and CompoundsJournal Quartile in Scopus:
Q1Journal Quartile in Web of Science:
Q1Bibliographic Citation:
Evgeniy V. Eremin. Synthesis of NdSc3(BO3)4 single crystals and study of its structure properties [Текст] / Evgeniy V. Eremin, Maxim S. Pavlovskiy, Irina A. Gudim, Temerov Vladislav, Molokeev Maxim, Nikita D. Andryushin, Evgeniy V. Bogdanov // Journal of Alloys and Compounds. — 2020. — Т. 828. — С. 154355-6Abstract:
Using the group method, single crystals of NdSc3(BO3)4 are grown from a melt solution and X-ray
structural studies are performed. It is shown that at room temperature the NdSc3(BO3)4 crystal has a
huntite-type structure with space group P3121. The temperature dependence of the heat capacity shows
anomalous behaviour at Т ¼ 504 ± 1 K. This anomaly corresponds to a structural phase transition from
R32 to P3121. It is known that a similar transition occurs in RFe3(BO3)4 crystals; an anomaly in the specific
heat is also observed. Theoretical calculations are carried out from the first principles of the lattice
dynamics of the crystal under study in a high-symmetry phase with the R32 space group. An unstable
(soft) mode in the boundary point of Brillouin zone was found. It was determined that this structural
instability is responsible for the structural displacement-type phase transition R32 / P3121.