Phase stability, mechanical, electronic, magnetic and thermodynamic properties of the Pd2PrX(X=Cl, F) compounds: An Ab-initio study

Authors

  • Saadiya Benatmane Université Abdelhamid Ibn Badis de Mostaganem
  • M. Affane Université Abdelhamid Ibn Badis de Mostaganem
  • Y. Bouali University of Science and Technology Houari Boumediene
  • B. Bouadjemi Université Abdelhamid Ibn Badis de Mostaganem
  • S. Cherid Université Abdelhamid Ibn Badis de Mostaganem
  • W. Benstaali Université Abdelhamid Ibn Badis de Mostaganem

DOI:

https://doi.org/10.31349/RevMexFis.69.011003

Abstract

Many of the known examples of half-metallic ferromagnets HMF are oxides, sulfides, or Heusler alloys have attracted some interest for their potential use in spintronics. In order to achieve such understanding we have performed an ab-initio calculations with spin polarization using plane-wave pseudo potential technique based on the density-functional theory (DFT), the exchange-correlation potential was treated with the generalized gradient approximation (PBE-GGA), whereas for the treatment of on-site electron-electron correlations the PBE-GGA+U approximation (where U is the Hubbard Coulomb energy term) are applied for the calculation of the structural, electronic, elastic and magnetic properties of Pd2PrX (X=Cl, F). The results showed that for Pd2PrCl and Pd2PrF, Hg2CuTi-type structure is energetically more stable than Cu2MnAl-type structure at the equilibrium volume. Electronically, Pd2PrCl and Pd2PrF exhibit half-metallicity with small band gaps of 0.06 and 0.25eV respectively with GGA-PBE+U in the spin-down channels whereas spin-up channels are conducting. The calculated total magnetic moment of 2.00 μB per formula unit is very close to integer value and agree well with the Slater-Pauling rules ( Mtot=34-Ztot), where the magnetic moment is basically carried by Pr atoms. However, the elastic properties show that Pd2PrX (X=Cl, F) compounds are ductile and anisotropic according to the analysis of B/G and Cauchy’s pressure. The Thermodynamic properties were also analyzed using the quasi-harmonic Debye model. Both the compounds are found structurally stable.

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Published

2023-01-03

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[1]
S. Benatmane, M. Affane, Y. Bouali, B. Bouadjemi, S. Cherid, and W. Benstaali, “Phase stability, mechanical, electronic, magnetic and thermodynamic properties of the Pd2PrX(X=Cl, F) compounds: An Ab-initio study”, Rev. Mex. Fís., vol. 69, no. 1 Jan-Feb, pp. 011003 1–, Jan. 2023.

Issue

Vol. 69 No. 1 Jan-Feb (2023): Revista Mexicana de Física

Section

10 Material Sciences

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Copyright (c) 2023 Saadiya Benatmane, M. Affane, Y. Bouali; B. Bouadjemi; S. Cherid, W. Benstaali

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