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Applied Physics A

, 125:800 | Cite as

The structural, magnetic, electronic, and mechanical properties of the full Heusler alloys Ti2CoTl1−xPbx (x = 0.00, 0.25, 0.50, 0.75, 1.00)

  • Yang ZhouEmail author
  • Jian-Min Zhang
Article
  • 25 Downloads

Abstract

We investigate the structural, magnetic, electronic, and mechanical properties of the full Heusler alloys (FHAs) Ti2CoTl1−xPbx (x = 0.00, 0.25, 0.50, 0.75, 1.00) using first-principles calculations. The FHAs Ti2CoTl1−xPbx have the half-metallic characters within lattice constant regions 5.799–6.707, 5.749–6.821, 5.749–6.982, 5.789–7.115, and 5.976–6.943 Å for x = 0.00, 0.25, 0.50, 0.75, and 1.00, respectively. The negative formation energy, positive cohesion energy, and higher than room temperature Curie temperature indicate that the FHAs Ti2CoTl1−xPbx are thermodynamically stable and can be used in spintronics and magnetoelectronics. The total magnetic moment per formula unit \(\mu_{\text{t}}\) of the FHAs Ti2CoTl1−xPbx satisfies the Slater–Pauling rule \(\mu_{\text{t}} = Z{}_{\text{t}} - 18\), where \(Z_{\text{t}}\) represents the total number of valence electrons per formula unit. With increasing Pb atom concentration x, the band structures in both spin-up and spin-down channels move toward low energy region, but the spin-down indirect band gap \(E_{g}^{ \downarrow }\) increases. In addition, the calculated elastic constants and elastic modulus indicate that the FHAs Ti2CoTl1−xPbx have mechanical stability, as well as ductility and strong resistance to fracture and plastic deformation.

Notes

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Authors and Affiliations

  1. 1.College of Physics and Information TechnologyShaanxi Normal UniversityXianPeople’s Republic of China

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