The investigation of electronic, magnetic, mechanical, and lattice dynamical properties of PdMX (M = Cr, Fe and X = Si and Ge) ferromagnetic half-Heusler metallics: an ab initio study

Date

2017-06-01

Author

ERKİŞİ, AYTAÇ
SÜRÜCÜ, GÖKHAN

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PdMX (M = Cr, Fe and X = Si, Ge) half-Heusler alloys, have been investigated in cubic C1(b) crystal structure which conforms to F (4) over bar 3m space group by using local spin density approximation (LSDA) within the density functional theory (DFT). Firstly, for all materials, the most stable structural phase, which is type-II phase, has been determined. Then, all materials have been considered in ferromagnetic (FM), paramagnetic (PM) and antiferromagnetic (AFM) orders in the most stable type-II structure. The estimated Curie temperatures by using energy differences between FM and PM phases in mean field approximation have been found to be noticeably higher than the room temperature. After the determination of the most stable magnetic phase, their full structural, mechanical, electronic, and lattice dynamical properties have been studied in the most stable magnetic and structural phase. The calculated electronic band structure and total electronic density of states (DOS) have showed that there is no band gap revealing metallic behavior. The estimated elastic constants and calculated phonon dispersion curves have confirmed the stability of FM phase, both mechanically and dynamically.

Subject Keywords

Electronic, Optical and Magnetic Materials, Surfaces, Coatings and Films, Polymers and Plastics, Metals and Alloys, Biomaterials

URI

https://hdl.handle.net/11511/65124

Journal

MATERIALS RESEARCH EXPRESS

DOI

https://doi.org/10.1088/2053-1591/aa730e

Collections

Department of Physics, Article

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Citation Formats

A. ERKİŞİ and G. SÜRÜCÜ, “The investigation of electronic, magnetic, mechanical, and lattice dynamical properties of PdMX (M = Cr, Fe and X = Si and Ge) ferromagnetic half-Heusler metallics: an ab initio study,” MATERIALS RESEARCH EXPRESS, pp. 0–0, 2017, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/65124.