English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Using first-principles electronic structure calculations, we have studied thedependence of the Curie temperature on external hydrostatic pressure for randomNi2MnSn Heusler alloys doped with Cu and Pd atoms, over the entire range ofdopant concentrations. The Curie temperatures are calculated by applyingrandom-phase approximation to the Heisenberg Hamiltonian whose parameters aredetermined using the linear response and multiple scattering methods, based ondensity-functional theory. In (Ni1-x,Pdx)2MnSn alloys, the Curie temperature isfound to increase with applied pressure over the whole concentration range. Thecrossover from the increase to the decrease of the Curie temperature withpressure takes place for Cu concentrations larger than about 70% in(Ni1-x,Cux)2MnSn Heusler alloys. The results for the reference Ni2MnSn Heusleralloy agree well with a previous theoretical study of E. Sasioglu, L. M.Sandratskii and P. Bruno Phys. Rev. B 71 214412 (2005) and also reasonably wellwith available experimental data. Results for the spin-disorder-induced part ofthe resistivity in (Ni1-x,Pdx)2MnSn Heusler alloys, calculated by using thedisordered local moment model, are also presented. Finally, a qualitativeunderstanding of the results, based on Anderson's superexchange interaction andStearn's model of the indirect exchange interaction between localized anditinerant d electrons, is provided.

Pressure dependence of Curie temperature and resistivity in complex Heusler alloys