Properties of clinopyroxene LiFeGe2O6

Тип публикации: статья из журнала

Год издания: 2010

Идентификатор DOI: 10.1134/S1063783410110296

Аннотация: The polycrystalline compound LiFeGe2O6 has been synthesized by the solid-phase reaction. The X-ray diffraction, Mossbauer, calorimetric, and magnetic investigations have been carried out. The Mossbauer spectrum at 300 K represents a single quadrupole doublet. The isomer shift with respect to the metal iron alpha-Fe is 0.40 mm/s, which is characteristic of the Fe3+ high-spin ion in the octahedral coordination. The quadrupole splitting of 0.42 mm/s indicates a distortion of the oxygen octahedron around the iron cation. The results of the measurement of the temperature dependence of the heat capacity in the range 2-300 K have shown the presence of the only anomaly with a maximum at T (m) similar to 20.5 K, which indicates the occurrence of a magnetic phase transition in this point. The data of the measurement of the temperature dependence of the magnetization have confirmed that the magnetic order with the dominant antiferromagnetic interaction of magnetically active ions exists in LiFeGe2O6 at a temperature below 20.5 K. The investigation of the temperature dependence of the heat capacity in the magnetic field H up to 9 T has demonstrated that the external factor insignificantly changes the order-disorder transition point (at H = 9 T, there occurs a shift of similar to 0.5 K toward the low-temperature range).

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Издание

Журнал: PHYSICS OF THE SOLID STATE

Выпуск журнала: Vol. 52, Is. 11

Номера страниц: 2405-2408

ISSN журнала: 10637834

Место издания: NEW YORK

Издатель: MAIK NAUKA/INTERPERIODICA/SPRINGER

Авторы

  • Drokina T.V. (Siberian Federal University)
  • Shimchak R. (Institute of Physics,Polish Academy of Sciences)
  • Petrakovskii G.A. (Siberian Federal University)
  • Bayukov O.A. (Siberian Federal University)
  • Bovina A.F. (Kirensky Institute of Physics, Siberian Branch,Russian Academy of Sciences)
  • Velikanov D.A. (Siberian Federal University)
  • Kartashev A.V. (Kirensky Institute of Physics, Siberian Branch,Russian Academy of Sciences)
  • Volkova A.L. (Kirensky Institute of Physics, Siberian Branch,Russian Academy of Sciences)
  • Ivanov D.A. (Kirensky Institute of Physics, Siberian Branch,Russian Academy of Sciences)
  • Stepanov G.N. (Kirensky Institute of Physics, Siberian Branch,Russian Academy of Sciences)

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