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Title: Melt-extracted Gd73.5Si13B13.5/GdB6 ferromagnetic/antiferromagnetic microwires with excellent magnetocaloric properties

Abstract

A novel class of magnetocaloric microwires composed of antiferromagnetic GdB6 nanocrystals embedded in an amorphous ferromagnetic Gd73.5Si13B13.5 matrix is reported. These composite microwires were created directly from a melt-extraction process. XRD, TEM, HRTEM and SAED confirm the formation of GdB6 nanocrystals (~10 nm) in the amorphous Gd73.5Si13B13.5 matrix. As a second-order magnetic material, the Gd73.5Si13B13.5/GdB6 microwires exhibit an excellent magnetocaloric response, with a large magnetic entropy change ΔSM ~6.4 J kg-1 K-1 at ~120 K, a large temperature interval δTFWHM ~130 K, and the large refrigerant capacity RC ~890 J kg-1 for a field change of 5 T. Such microwires are a promising candidate for active magnetic refrigeration in the temperature range of 10–200 K.

Authors:
 [1];  [2];  [3];  [4];  [5];  [6]
+ Show Author Affiliations
  1. Univ. of South Florida, Tampa, FL (United States); VNU Univ. of Science, Hanoi (Vietnam); Univ. of Danang (Vietnam)
  2. Univ. of South Florida, Tampa, FL (United States); Harbin Institute of Technology (China)
  3. Ubon Ratchathani Univ. (Thailand)
  4. VNU Univ. of Science, Hanoi (Vietnam)
  5. Harbin Institute of Technology (China)
  6. Univ. of South Florida, Tampa, FL (United States)
Publication Date:
Research Org.:
Univ. of South Florida, Tampa, FL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1800498
Alternate Identifier(s):
OSTI ID: 1579434
Grant/Contract Number:  
FG02-07ER46438
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Alloys and Compounds
Additional Journal Information:
Journal Volume: 818; Journal ID: ISSN 0925-8388
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; melt-extraction; magnetic microwires; magnetocaloric effect; magnetic refrigeration

Citation Formats

Duc, N. T.M., Shen, H. X., Thiabgoh, O., Huong, N. T., Sun, J. F., and Phan, M. H. Melt-extracted Gd73.5Si13B13.5/GdB6 ferromagnetic/antiferromagnetic microwires with excellent magnetocaloric properties. United States: N. p., 2019. Web. doi:10.1016/j.jallcom.2019.153333.
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Duc, N. T.M., Shen, H. X., Thiabgoh, O., Huong, N. T., Sun, J. F., & Phan, M. H. Melt-extracted Gd73.5Si13B13.5/GdB6 ferromagnetic/antiferromagnetic microwires with excellent magnetocaloric properties. United States. https://doi.org/10.1016/j.jallcom.2019.153333
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Duc, N. T.M., Shen, H. X., Thiabgoh, O., Huong, N. T., Sun, J. F., and Phan, M. H. Tue . "Melt-extracted Gd73.5Si13B13.5/GdB6 ferromagnetic/antiferromagnetic microwires with excellent magnetocaloric properties". United States. https://doi.org/10.1016/j.jallcom.2019.153333. https://www.osti.gov/servlets/purl/1800498.
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@article{osti_1800498,
title = {Melt-extracted Gd73.5Si13B13.5/GdB6 ferromagnetic/antiferromagnetic microwires with excellent magnetocaloric properties},
author = {Duc, N. T.M. and Shen, H. X. and Thiabgoh, O. and Huong, N. T. and Sun, J. F. and Phan, M. H.},
abstractNote = {A novel class of magnetocaloric microwires composed of antiferromagnetic GdB6 nanocrystals embedded in an amorphous ferromagnetic Gd73.5Si13B13.5 matrix is reported. These composite microwires were created directly from a melt-extraction process. XRD, TEM, HRTEM and SAED confirm the formation of GdB6 nanocrystals (~10 nm) in the amorphous Gd73.5Si13B13.5 matrix. As a second-order magnetic material, the Gd73.5Si13B13.5/GdB6 microwires exhibit an excellent magnetocaloric response, with a large magnetic entropy change ΔSM ~6.4 J kg-1 K-1 at ~120 K, a large temperature interval δTFWHM ~130 K, and the large refrigerant capacity RC ~890 J kg-1 for a field change of 5 T. Such microwires are a promising candidate for active magnetic refrigeration in the temperature range of 10–200 K.},
doi = {10.1016/j.jallcom.2019.153333},
journal = {Journal of Alloys and Compounds},
number = ,
volume = 818,
place = {United States},
year = {Tue Dec 10 00:00:00 EST 2019},
month = {Tue Dec 10 00:00:00 EST 2019}
}
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https://doi.org/10.1016/j.jallcom.2019.153333
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