Electronic structure and optical properties of the GdNi2Mnx compounds

Yu V. Knyazev, A. V. Lukoyanov, Yu I. Kuz'Min, V. S. Gaviko

Результат исследований: Вклад в журналСтатьярецензирование

Аннотация

The electronic structure and optical properties of the GdNi2Mnx compounds (x = 0, 0.4, 0.6) have been investigated. The spin-polarized electronic structure calculations were performed in the approximation of local electron spin density with a correction for strong electronic correlations in the LSDA+U method. The changes in the magnetic moments and exchange interactions in GdNi2Mnx (x = 0, 0.4, 0.6), which determine the increase in the Curie temperature with variation in the manganese concentration, were determined. The optical constants of the compounds were measured by the ellipsometric method in the wide spectral range 0.22–15 μm. The features of the modification of the frequency dependencies of optical conductivity with a change in the manganese concentration are revealed. Based on the calculated densities of the electronic states, the behavior of these dispersion curves in the region of interband absorption of light is discussed. The concentration dependencies of a number of the electronic characteristics are determined.

Язык оригиналаАнглийский
Страницы (с-по)208-213
Число страниц6
ЖурналFizika Nizkikh Temperatur
Том44
Номер выпуска2
СостояниеОпубликовано - февр. 2018
Опубликовано для внешнего пользованияДа

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