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Title: Anisotropic magnetocaloric effect in single crystals of CrI 3

We report a systematic investigation of dc magnetization and ac susceptibility, as well as anisotropic magnetocaloric effect in bulk CrI 3 single crystals. A second-stage magnetic transition was observed just below the Curie temperature T c, indicating a two-step magnetic ordering. The low temperature thermal demagnetization could be well fitted by the spin-wave model rather than the single-particle model, confirming its localized magnetism. The maximum magnetic entropy change -ΔS$$max\atop{M}$$ ~5.65 J kg -1 K -1 and the corresponding adiabatic temperature change ΔT ad ~2.34 K are achieved from heat capacity analysis with the magnetic field up to 9 T. Anisotropy of ΔS M (T,H) was further investigated by isothermal magnetization, showing that the difference of -ΔS$$max\atop{M}$$ between the $ab$ plane and the c axis reaches a maximum value ~1.56 J kg -1 K -1 with the field change of 5 T. In conclusion, with the scaling analysis of ΔS M, the rescaled ΔS M (T,H) curves collapse onto a universal curve, indicating a second-order type of the magnetic transition. Furthermore, the -ΔS$$max\atop{M}$$ follows the power law of H n with n = 0.64 (1), and the relative cooling power depends on H m with m = 1.12 (1) .
Authors:
 [1] ; ORCiD logo [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
Publication Date:
Report Number(s):
BNL-207871-2018-JAAM
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:
SC0012704
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 97; Journal Issue: 17; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1462402
Alternate Identifier(s):
OSTI ID: 1438066