Electron Structure and Optical Properties of the Mn1.8Co1.2Al Alloy and Spin Gapless Semiconductor State

Electron Structure and Optical Properties of the Mn1.8Co1.2Al Alloy and Spin Gapless Semiconductor State

This paper studies the optical properties of the Mn 1.8 Co 1.2 Al alloy, whose composition is close to that of spin gapless Mn 2 CoAl semiconductor. Our investigation found the absence of intraband absorption contribution, which is an anomalous behavior of optical properties of the alloy. The presen...

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Veröffentlicht in:Physics of metals and metallography 2018-11, Vol.119 (11), p.1068-1072, Article 1068
Hauptverfasser: Shreder, E. I., Makhnev, A. A., Lukoyanov, A. V., Marchenkov, V. V.
Format: Artikel
Sprache:eng
Schlagworte:
Chemistry and Materials Science
Electrical and Magnetic Properties
Electronic structure
Energy gap
Intraband absorption
Materials Science
Metallic Materials
Optical properties
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Zusammenfassung:This paper studies the optical properties of the Mn 1.8 Co 1.2 Al alloy, whose composition is close to that of spin gapless Mn 2 CoAl semiconductor. Our investigation found the absence of intraband absorption contribution, which is an anomalous behavior of optical properties of the alloy. The presence of intense interband absorption in the IR range of spectrum indicates the existence of low-energy gap in the band spectrum of the alloy, which was found by electron structure calculations of the Mn 1.75 Co 1.25 Al alloy.
ISSN:0031-918X
1555-6190
1555-6190
DOI:10.1134/S0031918X18110194