Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 323, Issue 1, Pages 186-189Publisher
ELSEVIER
DOI: 10.1016/j.jmmm.2010.09.001
Keywords
Heusler alloy; Electronic structure; Magnetic property; Half-metal; Mn2CuMg
Ask authors/readers for more resources
In the paper Ab initio electronic structure calculations are applied to study the electronic structure and magnetism properties of a new Mn-based Heusler alloy Mn2CuMg. We take into account both possible L 2(1) structures (CuHg2Ti and AlCu2Mn types). The CuHg2Ti-type structure is found to be energetically more favorable than the AlCu2Mn-type structure and presents half-metallic ferrimagnetism. However, the case of exchanging X with Y atoms in generic formula loses its half-metallicity due to the symmetric surroundings. Calculations show that their total spin moment is -1 mu(B) for a wide range of equilibrium lattice constants and the total spin magnetic moment is attributed mainly to the two Mn atoms, while the Cu atom is almost non-magnetic. A small total spin moment origins from the antiparallel configurations of the Mn partial moments. The CuHg2Ti-type Mn2CuMg alloy keeps a 100% of spin polarization of conduction electrons at the Fermi level, thus opening the way to engineer new half-metallic alloys with the desired magnetic properties. (C) 2010 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available