New High-$T_c$ Half-Heusler Ferromagnets NiMnZ (Z = Si, P, Ge, As)

Abstract

Based on the first principle calculation, we propose a new class of high-$T_c$ half-heusler ferromagnets NiMnZ (Z = Si, P, Ge, As). The structural and magnetic properties are investigated through the calculation of the electronic structure, phase stability, equilibrium lattice constant, magnetic exchange interaction $J_{ij}$ and Curie temperature $T_c$. It is found that all alloys show half-metallicity and ferromagnetism at temperatures much higher than room temperature in a wide range of lattice expansion (compression). At the equilibrium lattice constant, $T_c$ of 715K, 840K, 875K and 1050K are predicted by Monte Carlo simulation for NiMnP, NiMnAs, NiMnGe and NiMnSi, respectively. Following these results, these alloys are strongly expected to be promising candidates for spintronic applications.

arXiv comment6 pages, 6 figures

References in corpus (3)

• Origin and Properties of the Gap in the Half-Ferromagnetic Heusler Alloys
• Calculating the Curie Temperature reliably in diluted III-V ferromagnetic semiconductors
• Disorder in Diluted Spin Systems

Cited by in corpus (6)

• Computational Investigation of Half-Heusler Compounds for Spintronics Applications
• Half-metallicity versus Symmetry in Pt, Ni and Co-based Half Heusler Alloys: A First-principles Calculation
• Ab-initio determined electronic and magnetic properties of half-metallic NiCrSi and NiMnSi Heusler alloys; the role of interfaces and defects
• Structural and magnetic properties of half-heusler alloys NiCrZ (Z = Si, P, Ge, As, Te): First principle study
• The fate of half-metallicity near interfaces: the case of NiMnSb/MgO and NiMnSi/MgO
• Epitaxial growth and magnetic properties of NiMnAs film on GaAs substrate