Electronic, structural and magnetic properties of Mn(1+x)Pt(1-x)Sb

Al Maruf, Abdullah; Ramker, Adam; Valloppilly, Shah; Shand, Paul M.; Lukashev, Pavel V.; Kharel, Parashu

doi:10.1016/j.jmmm.2021.168234

Title: Electronic, structural and magnetic properties of Mn_(1+x)Pt_(1-x)Sb

Journal Article · 23 June 2021 · Journal of Magnetism and Magnetic Materials

DOI: https://doi.org/10.1016/j.jmmm.2021.168234 · OSTI ID:1981677

Al Maruf, Abdullah ^[1];

^[2]; Valloppilly, Shah ^[3];

^[2];

^[2]; Kharel, Parashu ^[1]

South Dakota State University, Brookings, SD (United States)
University of Northern Iowa, Cedar Falls, IA (United States)
University of Nebraska, Lincoln, NE (United States)

Electronic and magnetic properties of half-metallic Heusler alloys can be modified by tuning their chemical compositions. We have carried out a combined theoretical and experimental investigation of Mn_(1+x)Pt_(1-x)Sb (0 ≤ x ≤ 0.5) alloys. Our first-principles calculations indicate that the stoichiometric MnPtSb exhibits nearly half-metallic band structure, but a robust half-metallicity can be achieved in Mn-rich compositions Mn_(1+x)Pt_(1-x)Sb (0 ≤ x ≤ 0.5) with x = 0.25 and higher in their cubic structures. In addition, while MnPtSb exhibits ferromagnetic alignment, Mn_(1+x)Pt_(1-x)Sb are ferrimagnetic for all non-zero values of x. We have also synthesized cubic MnPtSb and Mn_1.25Pt_0.75Sb alloys using arc melting and annealing. The magnetic properties of these alloys are consistent with our theoretical predictions. Furthermore, these results indicate that the Mn-rich Mn_(1+x)Pt_(1-x)Sb alloys have potential for spin-transport-based devices.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)

Grant/Contract Number:: SC0012704

OSTI ID:: 1981677

Journal Information:: Journal of Magnetism and Magnetic Materials, Journal Name: Journal of Magnetism and Magnetic Materials Journal Issue: C Vol. 537; ISSN 0304-8853

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Title: Electronic, structural and magnetic properties of Mn(1+x)Pt(1-x)Sb

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Title: Electronic, structural and magnetic properties of Mn_(1+x)Pt_(1-x)Sb