First-principles calculation of the intersublattice exchange interactions and Curie temperatures of the full Heusler alloysNi2MnX(X=Ga,In,Sn,Sb)

By E. Şaşıoğlu, L. Sandratskii, P. Bruno. 2004

240 citations recorded by the source corpus.

The interatomic exchange interactions and Curie temperatures in Ni-based full Heusler alloys Ni 2MnX with X= Ga, In, Sn, and Sb are studied within the framework of the density-functional theory. The calculation of the exchange parameters is based on the frozen-magnon approach. Despite closeness of the experimental Curie temperatures for all four systems, their magnetism appeared to differ strongly. This difference involves both the Mn-Mn and Mn-Ni exchange interactions. The Curie temperatures, TC, are calculated within the mean-field approximation by solving a matrix equation for a multisublattice system. Good agreement with experiment for all four systems is obtained. The role of different exchange interactions in the formation of TC of the systems is discussed.

Subfields: Electronic, Optical and Magnetic Materials, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/83d7b6baab974c1854d1689dc2fd97709660e703

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In Electronic, Optical and Magnetic Materials

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Citations in the corpus

• Inverse magnetocaloric effect in ferromagnetic Ni–Mn–Sn alloys (2005, result): “Although a microscopic interpretation of these results would require ab initio calculations in non-stoichiometric systems, results for stoichiometric alloys show that the magnetic interactions in Ni 2 MnSn are very sensitive to the atomic distance”