Synthesis of NdSc3(BO3)(4) single crystals and study of its structure properties : научное издание | Научно-инновационный портал СФУ

Synthesis of NdSc3(BO3)(4) single crystals and study of its structure properties : научное издание

Тип публикации: статья из журнала

Год издания: 2020

Идентификатор DOI: 10.1016/j.jallcom.2020.154355

Ключевые слова: Phase transition, Crystal growth, Lattice dynamics, Multiferroic

Аннотация: 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 P3(1)21. The temperature dependence of the heat capacity shows anomalous behaviour at T = 504 +/- 1 K. This anomaly corresponds to a structural phase transition from R32 to P3(1)21. 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 -> P3(1)21. (C) 2020 Elsevier B.V. All rights reserved.

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Издание

Журнал: JOURNAL OF ALLOYS AND COMPOUNDS

Выпуск журнала: Vol. 828

ISSN журнала: 09258388

Место издания: LAUSANNE

Авторы

  • Eremin Evgeniy V. (RAS, Kirensky Inst Phys, Fed Res Ctr, KSC,SB, Krasnoyarsk 660036, Russia; RAS, Kirensky Inst Phys, Fed Res Ctr, KSC,SB, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia; Siberian State Univ Sci & Technol, Krasnoyarsk 660037, Russia)
  • Pavlovskiy Maxim S. (RAS, Kirensky Inst Phys, Fed Res Ctr, KSC,SB, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Gudim Irina A. (RAS, Kirensky Inst Phys, Fed Res Ctr, KSC,SB, Krasnoyarsk 660036, Russia)
  • Temerov Vladislav (RAS, Kirensky Inst Phys, Fed Res Ctr, KSC,SB, Krasnoyarsk 660036, Russia)
  • Molokeev Maxim (RAS, Kirensky Inst Phys, Fed Res Ctr, KSC,SB, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Andryushin Nikita D. (RAS, Kirensky Inst Phys, Fed Res Ctr, KSC,SB, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Bogdanov Evgeniy V. (RAS, Kirensky Inst Phys, Fed Res Ctr, KSC,SB, Krasnoyarsk 660036, Russia; Krasnoyarsk State Agr Univ, Inst Engn Syst & Energet, Krasnoyarsk 660049, Russia)

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