Spin-orbit coupling effect on the electronic structure of Sr2FeHfO6 alloy for spintronics device application

• Main Author: Maleque, Md. Abdul
• Format: Article
• Language: English; English
• Published: Elsevier B.V. 2021
• Subjects: QC Physics; T11.95 Industrial directories; T173.2 Technological change; TK452 Electric apparatus and materials. Electric circuits. Electric networks
• Online Access: http://irep.iium.edu.my/83604/1/IJMMM_2021_published.pdf; http://irep.iium.edu.my/83604/7/83604_Spin-orbit%20coupling%20effect%20on%20the%20electronic_scopus.pdf; http://irep.iium.edu.my/83604/; http://www.elsevier.com/locate/jmmm

Strong spin–orbit coupling (SOC) in Sr2FeHfO6 (SFHO) alloy has been predicted by means of full-potential linear augmented plane wave method in order to study the effect on electronic structure. The tetragonal (I4/mmm) SFHO with SOC has an up-spin energy of ~1.2 eV and a total magnetic moment of ~2.03 μB mainly coming from the Fe (1.63 μB), and the SOC effect was prominent in SFHO due to the magnetic moment of 3d-Fe orbitals. The XAFS spectroscopy technique was used in order to analyze the electronic structure and optical properties of SFHO. The absorption spectra with Fe as a source atom shows a peak appearing around 7118 eV. SFHO with SOC falls within the half metallic state in the up-spin direction resulting significant increase of the total magnetic moment. This half-metallicity strong SOC in SFHO demonstrate much spin polarized electrons around the Fermi level, hence, this material is very potential in future memory devices and spintronic applications.