Ferrimagnetism and half-metallicity in Cr-substituted Mn4-xCrxAl11

Authors

• Noor, Missouri State University
• Yasmin, Missouri State University
• Tiglet Besara, Missouri State UniversityFollow
• Law, Department of Physics and Astronomy
• Hauser, Department of Physics and Astronomy

Abstract

Single crystals of disordered Mn4-xCrxAl11 have been synthesized via the flux method. EDS on several crystals of various sizes and shapes revealed an average molar ratio of 17:9:74 for Mn:Cr:Al, while x-ray diffraction on three different crystals yield compositions Mn2.26Cr1.74Al11 (Mn4-xCrxAl11, x = 1.74), Mn0.83Cr3.17Al11, and Mn1.07Cr2.93Al11. This compound crystallizes in space group P 1 ¯ , isostructural with both Mn4Al11 and Cr4Al11. Magnetic measurements on several crystals show that this disordered compound is ferrimagnetic with a low effective moment of ? eff ? 1.012 ± 0.004 ? B / f . u . and a non-reachable transition temperature. Density functional theory calculations display opening of a bandgap in the spin-up channel near the Fermi level with increasing Cr content, an indication of half-metallicity.

Department(s)

Physics, Astronomy, and Materials Science

Document Type

Article

DOI

10.1088/1361-648X/add8d8

Keywords

disordered structure, ferrimagnetism, flux synthesis, half-metallicity, single crystal growth

Publication Date

6-9-2025

Recommended Citation

Noor; Yasmin; Besara, Tiglet; Law; and Hauser, "Ferrimagnetism and half-metallicity in Cr-substituted Mn4-xCrxAl11" (2025). Faculty Scholarship. 136.
https://bearworks.missouristate.edu/articles00/136

Journal Title

Journal of Physics Condensed Matter