Anisotropic magnetocaloric effect in single crystals of CrI3

Article

关键词: CHROMIUM HEXATELLUROSILICATE CR2SI2TE6;    INTRINSIC FERROMAGNETISM;    MAGNETIC REFRIGERATION;    SPIN-WAVE;    ALLOYS;   

DOI  :  10.1103/PhysRevB.97.174418

来源: SCIE

【 摘 要 】

We report a systematic investigation of dc magnetization and ac susceptibility, as well as anisotropic magnetocaloric effect in bulk CrI3 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 - Delta S-M(max) similar to 5.65 J kg(-1) K-1 and the corresponding adiabatic temperature change Delta T-ad similar to 2.34 K are achieved from heat capacity analysis with the magnetic field up to 9 T. Anisotropy of Delta S-M(T,H) was further investigated by isothermal magnetization, showing that the difference of - Delta S-M(max) between the ab plane and the c axis reaches a maximum value similar to 1.56 J kg(-1) K-1 with the field change of 5 T. With the scaling analysis of A Sm, the rescaled Delta S-M(T, H) curves collapse onto a universal curve, indicating a second-order type of the magnetic transition. Furthermore, the - Delta S-M(max) 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).

【 授权许可】

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