First-Principles Study of Structural, Electronic, Magnetic and Elastic Properties of the Mn2XSb (X = Co, Fe) Inverse Heusler Alloys

Journal of Electronic Materials (2021)Cite this article

Abstract

We predicted the electronic structure and half-metallic properties of the Mn2XSb (X = Co, Fe) inverse Heusler alloys using the full-potential linearized augmented plane wave (FPLAPW) method. We used generalized gradient approximation (GGA) and GGA + U schemes to compute the electronic structure for both alloys. We employed the Tran and Blaha modified Becke–Johnson (TB-mBJ) potential to accurately estimate the band gap. The stability has been determined by calculating their formation energy and elastic constants under ambient conditions. Both alloys show a half-metallic ferromagnetic nature with a 100% spin polarization at the Fermi level. The calculated total spin magnetic moments of Mn2XSb (X = Co, Fe) alloys are \( 4\upmu_{B} \) and \( 3\upmu_{B} \), respectively, which is a good agreement with the well-known Slater–Pauling rule of 24. The predicted Curie temperature for both alloys is greater than room temperature. The half-metallic and high spin polarization properties make them one of the promising candidates for spintronic device applications.

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Affiliations

  1. Smart Materials Research Laboratory, Department of Physics, Thiagarajar College of Engineering, Madurai, Tamil Nadu, 625 015, India

    V. Aravindan & M. Mahendran

  2. Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai, Maharashtra, 400 085, India

    A. K. Rajarajan

Authors
  1. V. Aravindan
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  2. A. K. Rajarajan
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  3. M. Mahendran
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Correspondence to M. Mahendran.

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The authors M. Mahendran and V. Aravindan acknowledge the financial support by the UGC-DAE Consortium for Scientific Research, Mumbai under the collaborative research scheme through Grant No. CRS-M-259.

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Aravindan, V., Rajarajan, A.K. & Mahendran, M. First-Principles Study of Structural, Electronic, Magnetic and Elastic Properties of the Mn2XSb (X = Co, Fe) Inverse Heusler Alloys. Journal of Elec Materi (2021). https://doi.org/10.1007/s11664-020-08688-5

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Keywords

  • Inverse Heusler alloys
  • half-metallic ferromagnetism
  • first-principles calculations
  • spintronics