Localization versus delocalization of d-states within the [Formula: see text]MnGa Heusler alloy.

ABSTRACT: We present calculations based on density-functional theory with improved exchange-correlation approaches to investigate the electronic structure of [Formula: see text]MnGa magnetic shape memory alloy prototype. We study the effects of hybrid functionals as well as a Hubbard-like correction parameter U on the structural, electronic and magnetic properties of the alloy. We show that the previously successful application of U on Mn should be extended by including U on Ni to describe the d localized electrons more accurately and in better agreement with experiments. The bonding interactions within this intermetallic alloy are analysed including the role of non-transition metal. We found that the strongest and most stabilizing bond is formed between the Ga-Ni pairs due to the delocalized s-s an

SUBMITTER: Janovec J 

PROVIDER: S-EPMC9708842 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature