Electronic Structure and Optical Properties of the Co2NiAl Heusler Alloy
- Authors: Shreder E.I.1, Lukoyanov A.V.1,2, Makhnev A.A.1, Baglasov E.D.2, Suresh K.G.3
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Affiliations:
- Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
- Ural Federal University
- Indian Institute of Technology, Bombay, Department of Physics
- Issue: Vol 120, No 8 (2019)
- Pages: 729-732
- Section: Electrical and Magnetic Properties
- URL: https://journals.rcsi.science/0031-918X/article/view/168613
- DOI: https://doi.org/10.1134/S0031918X19080155
- ID: 168613
Cite item
Abstract
The frequency dependences of the real part ε1(ω) and imaginary part ε2(ω) of the complex dielectric constant of the Co2NiAl Heusler alloy are studied in a region of spectrum of 0.08–5 eV. It was found that the character of variations of the spectral parameters of the Co2NiAl ally is typical of media with metallic conductivity. In the IR region, the mechanism of intraband acceleration of electrons by the field of light wave dominates. The contribution of interband electron transitions is marked even at the energies E ≥ 0.15 eV. Results of the investigations are discussed based on the performed electronic structure calculations. It is shown that the main contribution to the resulting optical conductivity dependence is made by interband electron transitions in the band with spins opposite to the magnetization direction.
Keywords
About the authors
E. I. Shreder
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Author for correspondence.
Email: shreder@imp.uran.ru
Russian Federation, Ekaterinburg, 620108
A. V. Lukoyanov
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences; Ural Federal University
Email: shreder@imp.uran.ru
Russian Federation, Ekaterinburg, 620108; Ekaterinburg, 620002
A. A. Makhnev
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: shreder@imp.uran.ru
Russian Federation, Ekaterinburg, 620108
E. D. Baglasov
Ural Federal University
Email: shreder@imp.uran.ru
Russian Federation, Ekaterinburg, 620002
K. G. Suresh
Indian Institute of Technology, Bombay, Department of Physics
Email: shreder@imp.uran.ru
India, Mumbai
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