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Single-Crystal Growth and Room-Temperature Magnetocaloric Effect of X-Type Hexaferrite Sr2Co2Fe28O46

Journal Article · · Inorganic Chemistry
 [1];  [2];  [3];  [4];  [4];  [5];  [6];  [3];  [7];  [8];  [3]
  1. Sun Yat-Sen Univ., Guangzhou (China). School of Chemistry and Chemical Engineering; Rutgers Univ., Piscataway, NJ (United States); South China Univ. of Technology (SCUT), Guangzhou (China)
  2. Guangxi Univ. of Science and Technology, Liuzhou (China)
  3. Rutgers Univ., Piscataway, NJ (United States)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
  5. Chinese Academy of Sciences (CAS), Shanghai (China)
  6. Argonne National Lab. (ANL), Argonne, IL (United States)
  7. Sun Yat-Sen Univ., Guangzhou (China). School of Chemistry and Chemical Engineering; Rutgers Univ., Piscataway, NJ (United States)
  8. South China Univ. of Technology (SCUT), Guangzhou (China)
X-type hexaferrites have been receiving considerable attention due to their promising applications in many magnetic-electronic fields. However, the growth of single-crystal X-type hexaferrite is still a challenge. Herein we reported, for the first time, the preparation of single crystal X-type hexaferrite Sr2Co2Fe28O46 (Sr2Co2X) with high-quality and large size using floating-zone method with laser as the heating source. The crystals show rhombohedral symmetry with space group of R-3m (No. 166, a = 5.8935(1) Å and c = 83.7438(17) Å). Co2+ and Fe3+ oxidation states were confirmed by the X-ray absorption near-edge spectroscopy. The prepared Sr2Co2X exhibits a spin reorientation transition from easy-cone to easy-axis at T2 of 343 K and a ferrimagnetism–paramagnetism transition at Curie temperature (TC) of ~743 K. The spin reorientation transition was accompanied by magnetocaloric effect (MCE). Both conventional and inverse MCEs were observed near T2 with a magnetic field applied along the c-axis. The maximum value of the magnetic entropy change along the c-axis was evaluated to be 1.1 J/kg·K for a magnetic field change of 5 T.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0012704; AC02-06CH11357
OSTI ID:
1631933
Alternate ID(s):
OSTI ID: 1660272
Report Number(s):
BNL--215979-2020-JAAM
Journal Information:
Inorganic Chemistry, Journal Name: Inorganic Chemistry Journal Issue: 10 Vol. 59; ISSN 0020-1669
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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  • Choudhary, Harish Kumar; Pawar, Shital Patangrao; Bose, Suryasarathi
  • 2ND INTERNATIONAL CONFERENCE ON CONDENSED MATTER AND APPLIED PHYSICS (ICC 2017), AIP Conference Proceedings https://doi.org/10.1063/1.5033126
conference January 2018
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