Publication Date
3-6-2019
Department
Ames Laboratory
Campus Units
Ames Laboratory
OSTI ID+
1499026
Report Number
IS-J 9915
DOI
10.1016/j.jmmm.2019.03.026
Journal Title
Journal of Magnetism and Magnetic Materials
Volume Number
481
First Page
262
Last Page
267
Abstract
Systematic trends connect detailed composition, lattice parameters and magnetic transition temperatures in the ferromagnetic intermetallic compound AlT2X2 with the Mn2AlB2-type crystal structure, where T = Mn, Fe, Ni, Co and X = B, C. Data were derived from both literature reports and from experiments performed on synthesized samples (T = (Fe1−xNix)2, x = 0, 0.05, 0.1; X = (B0.9C0.1)2). It is observed that compositional variation alters specific bonds responsible for the magnetic phase transition response, which ranges from 200 K ≤ Tt ≤ 310 K. Elemental composition that provides changes in the c-axis length and the associated (T-T)c-axis interatomic distance contribute the largest bonding effects to magnetic phase transition temperature Tt, alterations. Overall, these results are attributed to the dependence of Tt on the specifics of the Fe sublattice occupancy, electronic state and T-T bonding. In contrast, Tt is found to be largely independent of the (b/a) axial ratios and the associated (T-X)b-axis/(T-X)(ac)-plane interatomic distance ratios, indicating that interatomic interactions along the a-axis have little effect on the Tt.
DOE Contract Number(s)
AR0000754; AC02-07CH11358
Language
en
Department of Energy Subject Categories
36 MATERIALS SCIENCE
Publisher
Iowa State University Digital Repository, Ames IA (United States)
