Document Type : Research

Authors

• Maryam Eliasi ¹
• Ali Mokhtari ²
• Vishtasb Soleimanian ²

¹ Ph.D. Student, Department of Physics, Faculty of Science, Shahrekord University, Shahrekord, Iran

² Department of Physics, Faculty of Science, Shahrekord University, Shahrekord, Iran

Abstract

Heusler alloys have recently received much attention due to their memory, spintronic properties, and unique application in industry and technology. The structural, electronic, and optical properties of Heusler compounds KYBX (Y=Ca, Sr and X=S, Se) have been studied in this research. The results show that these alloys are magnetic half-metals with 100% spin polarization at the Fermi level. The half-metal properties, magnetic properties, shape memory effect, magnetothermal, high magnetoresistance, thermoelectric phenomena, etc., have increased the potential of these alloys in the industry. Optical properties also confirm their half-metallic nature. Optical studies of these compounds show that the maximum reflection is in the low-energy (infrared region) and they have high absorption in the ultraviolet region. These compounds work as a reflector for infrared radiation. The presence of a small peak in the visible range of the absorption spectra of the studied materials is one of their interesting features for application in photovoltaic devices.

Keywords

• Quaternary Heusler alloys
• Time-dependent density functional theory
• Electron energy loss spectroscopy
• Electronic and optical properties