Contribution of Co3+ ions to the high-temperature magnetic and electrical properties of GdCoO3

Тип публикации: статья из журнала

Год издания: 2012

Идентификатор DOI: 10.1134/S106377611203003X

Ключевые слова: Energy spectra, Gadolinium ions, Gap widths, High temperature, Magnetic and electrical properties, Magnetic behavior, Paramagnetic contribution, Polycrystalline, Room temperature, Static magnetization, Strong electron correlations, Temperature dependence, Temperature range, Electric properties, Electronic structure, Gadolinium, Magnetic susceptibility, Magnetization, Paramagnetism, Temperature distribution, Ions

Аннотация: The temperature dependence of the static magnetization of polycrystalline rare-earth cobaltite GdCoO3 is measured in the temperature range 2-800 K. The magnetic behaviors of GdCoO3 and Gd3+ are found to be different at temperatures above room temperature, which is caused by the appearance of a contribution from Co3+ ions at high temperatures. The temperature dependence of the magnetic susceptibility of GdCoO3 is determined by the magnetization of rare-earth gadolinium ions and the additional paramagnetic contribution induced by the thermally excited magnetic terms of Co3+ ions. The LDA + GTB method is used to calculate the electronic structure of GdCoO3 in the temperature range 0-300 K with allowance for strong electron correlations. The energy spectrum of GdCoO3 is found to have intragap states that decrease the dielectric gap width with increasing temperature.

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Издание

Журнал: JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS

Выпуск журнала: Vol. 114, Is. 5

Номера страниц: 841-849

ISSN журнала: 10637761

Место издания: NEW YORK

Издатель: MAIK NAUKA/INTERPERIODICA/SPRINGER

Авторы

  • Dudnikov V.A. (Reshetnev Siberian State Aerospace University)
  • Ovchinnikov S.G. (Siberian Federal University)
  • Orlov Y.S. (Kirensky Institute of Physics,Siberian Branch,Russian Academy of Sciences)
  • Kazak N.V. (Kirensky Institute of Physics,Siberian Branch,Russian Academy of Sciences)
  • Patrin G.S. (Siberian Federal University)
  • Yurkin G.Y. (Kirensky Institute of Physics,Siberian Branch,Russian Academy of Sciences)
  • Michel C.R. (Universidade de Guadalajara)

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