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)

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