A search for half metallicity in half Heusler alloys

Babalola, M. I.; Iyorzor, B. E.

doi:10.1016/j.jmmm.2019.165560

Cited by 9 publications

(2 citation statements)

References 18 publications

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“…The compound RuCrAs is found to be stiffer than RuFeAs due to the high value of Y. Moreover, both the title materials are stiffer than the analogous RuVAs (153.812 GPa) [20], NiCrAs (47.50 GPa) [52], HfFeBi (139.60 GPa) [51] and TiFeBi (111.57 GPa) [51] compounds respectively. The computed values of ν predict that the alloys reveal the ionic bonding among the constituent atoms with central forces.…”

Section: Mechanical Stabilitymentioning

confidence: 93%

“…The value of B predicts that RuFeAs is softer than RuCrAs whereas the value of G reveals that RuCrAs possesses strong resistance to plastic deformation. Both the alloys are found to be softer than analogous compounds like RuVAs (202.643 and 183.31 GPa) [20,21], RhCrAs (206 GPa) [49] whereas harder than RhFeAs (133.686 GPa) [50], HfFeBi (104.2 GPa) [51], TiFeBi (91 GPa) [51] and HfRuSb (144.09 GPa) [26] materials. The compound RuCrAs is found to be stiffer than RuFeAs due to the high value of Y.…”

Section: Mechanical Stabilitymentioning

confidence: 99%

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Investigation of mechanical, thermodynamical, dynamical and electronic properties of RuYAs (Y = Cr and Fe) alloys

Kalita

Ram

Limbu

et al. 2021

J. Phys.: Condens. Matter

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Investigation of structural, dynamical, mechanical, electronic and thermodynamic properties of RuYAs (Y = Cr and Fe) alloys have been performed from the first principle calculations. Among the three structural phases, ‘α’ phase is found to be energetically favorable for both the RuCrAs and RuFeAs compounds. The computed cohesive energies and phonon dispersion spectra indicate the structural and dynamical stabilities of both the compounds. Mechanical stability of these compounds are studied using elastic constants. The Pugh’s ratio predicts RuFeAs to be more ductile than RuCrAs. The RuCrAs alloy, on the other hand, is found to be a stiffer, harder and highly rigid crystal with stronger bonding forces than the RuFeAs. Furthermore, the thermodynamical properties have also been estimated with respect to the temperature under different pressures using the quasi-harmonic Debye model. In order to account for the effect of the highly correlated d transition elements in the system we incorporated the GGA + U approximations. Within the GGA + U approach, the electronic structure reveals the half-metallicity for both compounds, which follows the Slater–Pauling rule. The charge density and electron localized function reflect the covalent bonding among the constituent atoms. Bader analysis reveals that the charge transfer takes place from Cr/Fe to Ru and As atoms in both approximations. Both Raman and infrared active modes have been identified in the compounds.

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