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.Показать полностьюThe 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