Publication Date
9-2019
Department
Ames Laboratory; Materials Science and Engineering
Campus Units
Ames Laboratory, Materials Science and Engineering
OSTI ID+
1571457
Report Number
IS-J 10059
DOI
10.1103/PhysRevMaterials.3.094411
Journal Title
Physical Review Materials
Volume Number
3
Issue Number
9
First Page
094411
Abstract
Bridgman single-crystal growth of AlFe2B2 resulted in systematic Fe-Al lattice site substitution in the AlFe2B2 (Mn2AlB2-type structure, aka 1−2−2) phase along the direction of solidification. The Fe:Al ratio varied from 1.94 to 2.06. The 1−2−2 phase lattice parameters, magnetic transition temperatures (Tt) 280−315 K, magnetic entropy changes (ΔS)2.3−4.0J/kgK, heat capacity (Cp) 117−147J/molK, and thermal conductivity (κ)∼2.4−11.5W/mK all varied monotonically across the region of solubility. These findings confirm the sensitivity of the magnetic and thermal properties of the AlFe2B2 compound to antisite defects. The interplay between Al and Fe lattice site occupancy and the resultant magnetic and electronic responses facilitates tailoring the properties of the AlFe2B2 system for potential functional applications, including magnetic cooling.
DOE Contract Number(s)
AR00000754; SC0014664; AC02-07CH11358
Language
en
Department of Energy Subject Categories
36 MATERIALS SCIENCE
Publisher
Iowa State University Digital Repository, Ames IA (United States)
