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This content will become publicly available on February 19, 2019

Title: Anisotropic magnetocaloric response in AlFe 2B 2

Experimental investigations of the magnetocaloric response of the intermetallic layered AlFe 2B 2 compound along the principle axes of the orthorhombic cell were carried out using aligned plate-like crystallites with an anisotropic [101] growth habit. Results were confirmed to be consistent with density functional theory calculations. Field-dependent magnetization data confirm that the a-axis is the easy direction of magnetization within the (ac) plane. The magnetocrystalline anisotropy energy required to rotate the spin quantization vector from the c-to the a-axis direction is determined as K~0.9 MJ/m 3 at 50 K. Magnetic entropy change curves measured near the Curie transition temperature of 285 K reveal a large rotating magnetic entropy change of 1.3 J kg -1K -1 at μ 0H app = 2 T, consistent with large differences in magnetic entropy change ΔS mag measured along the a- and c-axes. Overall, this study provides insight of both fundamental and applied relevance concerning pathways for maximizing the magnetocaloric potential of AlFe 2B 2 for thermal management applications.
ORCiD logo [1] ;  [1] ;  [2] ;  [3] ;  [4] ; ORCiD logo [5] ;  [2] ;  [6]
  1. Northeastern Univ., Boston, MA (United States). College of Engineering
  2. Ames Lab., Ames, IA (United States). Division of Materials Science & Engineering
  3. Univ. of Delaware, Newark, DE (United States). Dept. of Physics and Astronomy
  4. Ames Lab., Ames, IA (United States). Division of Materials Science & Engineering; Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
  5. McCallum Consulting LLC, Santa Fe, NM (United States)
  6. Northeastern Univ., Boston, MA (United States). College of Engineering; Northeastern Univ., Boston, MA (United States). Mechanical Engineering
Publication Date:
Report Number(s):
Journal ID: ISSN 0925-8388; PII: S0925838818306923
Grant/Contract Number:
AR00000754; AC02-07CH11358
Accepted Manuscript
Journal Name:
Journal of Alloys and Compounds
Additional Journal Information:
Journal Volume: 745; Journal Issue: C; Journal ID: ISSN 0925-8388
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
Country of Publication:
United States
OSTI Identifier: