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Title: Anisotropic magnetocaloric response in AlFe2B2

Abstract

Experimental investigations of the magnetocaloric response of the intermetallic layered AlFe2B2 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/m3 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 μ0Happ = 2 T, consistent with large differences in magnetic entropy change ΔSmag 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 AlFe2B2 for thermal management applications.

Authors:
ORCiD logo [1];  [1];  [2];  [3];  [4]; ORCiD logo [5];  [2];  [6]
+ Show Author Affiliations
  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:
Research Org.:
Ames Lab., Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1436423
Alternate Identifier(s):
OSTI ID: 1548702
Report Number(s):
IS-J-9650
Journal ID: ISSN 0925-8388; PII: S0925838818306923
Grant/Contract Number:  
AR00000754; AC02-07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Alloys and Compounds
Additional Journal Information:
Journal Volume: 745; Journal Issue: C; Journal ID: ISSN 0925-8388
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Barua, R., Lejeune, B. T., Ke, L., Hadjipanayis, G., Levin, E. M., McCallum, R. W., Kramer, M. J., and Lewis, L. H. Anisotropic magnetocaloric response in AlFe2B2. United States: N. p., 2018. Web. doi:10.1016/j.jallcom.2018.02.205.
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Barua, R., Lejeune, B. T., Ke, L., Hadjipanayis, G., Levin, E. M., McCallum, R. W., Kramer, M. J., & Lewis, L. H. Anisotropic magnetocaloric response in AlFe2B2. United States. https://doi.org/10.1016/j.jallcom.2018.02.205
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Barua, R., Lejeune, B. T., Ke, L., Hadjipanayis, G., Levin, E. M., McCallum, R. W., Kramer, M. J., and Lewis, L. H. Mon . "Anisotropic magnetocaloric response in AlFe2B2". United States. https://doi.org/10.1016/j.jallcom.2018.02.205. https://www.osti.gov/servlets/purl/1436423.
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@article{osti_1436423,
title = {Anisotropic magnetocaloric response in AlFe2B2},
author = {Barua, R. and Lejeune, B. T. and Ke, L. and Hadjipanayis, G. and Levin, E. M. and McCallum, R. W. and Kramer, M. J. and Lewis, L. H.},
abstractNote = {Experimental investigations of the magnetocaloric response of the intermetallic layered AlFe2B2 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/m3 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 μ0Happ = 2 T, consistent with large differences in magnetic entropy change ΔSmag 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 AlFe2B2 for thermal management applications.},
doi = {10.1016/j.jallcom.2018.02.205},
journal = {Journal of Alloys and Compounds},
number = C,
volume = 745,
place = {United States},
year = {2018},
month = {2}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1016/j.jallcom.2018.02.205
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Cited by: 38 works
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Figures / Tables:

Table I Table I: Atomic coordinates and occupancies for AlFe2B2 at room temperature from XRD refinement
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    Works referencing / citing this record:

    Crystal structure, spin reorientation, and rotating magnetocaloric properties of NdCo 5- x Si x compounds
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    A progress report on the MAB phases: atomically laminated, ternary transition metal borides
    journal, July 2019

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      Figures / Tables found in this record:

      Table I (p. 17)table
      Table II (p. 17)table
      Table III (p. 17)table
      Figure 1 (p. 18)figure
      Figure 2 (p. 18)figure
      Figure 3 (p. 19)figure
      Figure 4 (p. 19)figure
      Figure 5 (p. 20)figure
      Figure 6 (p. 20)figure
      Figure 7 (p. 21)figure
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