Energy Spectrum and Optical Absorption of Mn100 –хAlх (x = 20, 30) Compounds with the β-Mn Structure.

This paper presents electronic spectrum calculations and a study of the optical properties of the binary compounds Mn₇₀Al₃₀ and Mn₈₀Al₂₀ with the β-Mn structure. The energy dependences of the calculated density of states, with high values at the Fermi level, are determined by broad bands formed by manganese 3d states. The calculated electronic structures are used to analyze measured optical conductivity spectra of the alloys in the quantum light absorption range. From their optical properties in the infrared spectral region, we evaluate a number of characteristics of conduction electrons. [ABSTRACT FROM AUTHOR]