Mossbauer magnetization and resistivity studies of Fe1.91V0.09BO4

Описание

Тип публикации: статья из журнала (материалы конференций, опубликованные в журналах)

Конференция: International Conference on Strongly Correlated Electron Systems (SCES 04); Karlsruhe, GERMANY; Karlsruhe, GERMANY

Год издания: 2005

Идентификатор DOI: 10.1016/j.physb.2005.01.396

Ключевые слова: Mott-hubbard system; magnetism; new materials

Аннотация: Single crystals of Fe1.91V0.09BO4 were prepared by spontaneous crystallization using a solution melt technology for the first time and its structure, electronic and magnetic properties were investigated by X-ray diffraction, Mossbauer spectroscopy, magnetization and electrical measurements. Room-temperature Mossbauer measurements iПоказать полностьюndicate that "localized" (Fe2+, Fe3+) and "delocalized" (Fe2.5+) states in ratio 0.31:0.345:0.345 distributed over two crystallographically non-equivalent positions exist. The results of magnetic measurements show that warwickite is a P-type ferrimagnet below T = 130 K. Resistivity measurements show a variable-range-hopping when electron-electron interactions cause a soft Coulomb gap in the density of states at the Fermi energy. (c) 2005 Elsevier B.V. All rights reserved.

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Издание

Журнал: PHYSICA B-CONDENSED MATTER

Выпуск журнала: Vol. 359

Номера страниц: 1324-1326

ISSN журнала: 09214526

Место издания: AMSTERDAM

Издатель: ELSEVIER SCIENCE BV

Авторы

  • Kazak N.V. (LV Kirensky Institute of Physics,Siberian Branch of RAS)
  • Balaev A.D. (LV Kirensky Institute of Physics,Siberian Branch of RAS)
  • Ovchinnikov S.G. (LV Kirensky Institute of Physics,Siberian Branch of RAS)
  • Ivanova N.B. (Krasnoyarsk State Tech. University)

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