Сибирский федеральный университет

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

Конференция: Moscow International Symposium on Magnetism (MISM 2011); Lomonosov Moscow State Univ, Moscow, RUSSIA; Lomonosov Moscow State Univ, Moscow, RUSSIA

Год издания: 2012

Идентификатор DOI: 10.1016/j.jmmm.2012.02.096

Ключевые слова: Electronic structure, Spin crossover, Insulator-metal transition, Applied magnetic fields, Critical fields, Critical value, Insulator metal transition, Large spin, Negative magneto-resistance, Spin crossovers, Magnetic fields, Magnetic properties, Semiconductor insulator boundaries

Аннотация: The transformation of the band structure of LaCoO3 in the applied magnetic field has been theoretically studied. If the field is below its critical value B-C approximate to 65 T, the dielectric band gap decreases with the field, thus giving rise to negative magnetoresistance that is highest at T approximate to 300 divided by 500 K. The critical field is related to the crossover between the low- and high-spin terms of Co3+ ions. The spin crossover results in an insulator-metal transition induced by an increase in the magnetic field. Similar calculations have been done for GdCoO3 which is characterized by large spin gap similar to 2000K. (C) 2012 Elsevier B.V. All rights reserved.

Журнал: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

Выпуск журнала: Vol. 324, Is. 21

Номера страниц: 3584-3587

ISSN журнала: 03048853

Место издания: AMSTERDAM

Издатель: ELSEVIER SCIENCE BV

• Ovchinnikov S.G. (Siberian Federal University)
• Orlov Y.S. (Kirensky Institute of Physics,Siberian Branch,Russian Academy of Sciences)
• Dudnikov V.A. (Kirensky Institute of Physics,Siberian Branch,Russian Academy of Sciences)

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