Abstract
We report a systematic investigation of dc magnetization and ac susceptibility, as well as anisotropic magnetocaloric effect in bulk single crystals. A second-stage magnetic transition was observed just below the Curie temperature , 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 J and the corresponding adiabatic temperature change K are achieved from heat capacity analysis with the magnetic field up to 9 T. Anisotropy of was further investigated by isothermal magnetization, showing that the difference of between the plane and the axis reaches a maximum value J with the field change of 5 T. With the scaling analysis of , the rescaled curves collapse onto a universal curve, indicating a second-order type of the magnetic transition. Furthermore, the follows the power law of with , and the relative cooling power depends on with .
1 More- Received 31 March 2018
- Revised 29 April 2018
- Corrected 29 November 2018
- Corrected 14 January 2020
DOI:https://doi.org/10.1103/PhysRevB.97.174418
©2018 American Physical Society
Physics Subject Headings (PhySH)
Corrections
29 November 2018
Correction: Missing support information in the Acknowledgment section has been inserted.
14 January 2020
Second Correction: Some statements in the Acknowledgment section have been updated.