Heat capacity and magnetic properties of fluoride CsFe2+Fe3+F6 with defect pyrochlore structure

Тип публикации: статья из журнала

Год издания: 2016

Идентификатор DOI: 10.1016/j.jssc.2016.02.045

Ключевые слова: Pyrochlore structure, Phase transition, Magnetic properties, Thermal properties

Аннотация: Heat capacity, Mossbauer and Raman spectra as well as magnetic properties of fluoride CsFe2F6 with defect pyrochlore structure were studied. In addition to recently found above room temperature three successive structural transformations Pnma-Imma-I4(1)amd-Fd-3m, phase transition of antiferromagnetic nature with the 13.7 K Neel temperature and a broad heat capacity anomaly with a maximum at about 30 K were observed. The room temperature symmetry Pnma is unchanged at least down to 7 K. Simple model of indirect bond used to estimate the exchange interactions and to propose a magnetic structure model. (C) 2016 Elsevier Inc. All rights reserved.

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Издание

Журнал: JOURNAL OF SOLID STATE CHEMISTRY

Выпуск журнала: Vol. 237

Номера страниц: 330-335

ISSN журнала: 00224596

Место издания: SAN DIEGO

Издатель: ACADEMIC PRESS INC ELSEVIER SCIENCE

Персоны

Gorev M.V. (Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia; Siberian fed univ, nst Engn Phys & Radio Elect, Krasnoyarsk 660074, Russia)
Flerov I.N. (Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia; Siberian fed univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660074, Russia)
Tressaud A. (Univ Bordeaux, ICMCB CNRS, Inst Chim Matiere Condensee, F-33608 Pessac, France)
Bogdanov E.V. (Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia; Astafijev Krasnoyarsk State Pedag Univ, Krasnoyarsk 660049, Russia)
Kartashev A.V. (Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia; Krasnoyarsk State Agr Univ, Krasnoyarsk 660049, Russia)
Bayukov O.A. (Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia)
Eremin E.V. (Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia; Siberian fed univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660074, Russia)
Krylov A.S. (Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia)

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