2023/12/02 by Anirban Goswami, Goswami, Anirban, Nicholas Ng +7
Chemistry · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Inorganic Chemistry and Materials #Magnetic and transport properties of perovskites and related materials #Materials Science (cond-mat.mtrl-sci) #Rare-earth and actinide compounds
paper · pdf · doi:10.48550/arxiv.2312.01000
openalex publication_date 2023/12/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
We report a systematic investigation of anisotropic magnetocaloric effects in single crystal Cr2Te3. Single crystal samples are synthesized by chemical vapor transport and characterized by x-ray and Laue diffraction methods. The maximum magnetic entropy change -ΔS\text Mmax is 4.50 J kg-1 K-1 for the easy c-axis (3.36 J kg-1 K-1 for the hard ab-plane) and the relative cooling power RCP is 296.7 J kg-1 for the easy c-axis (183.84 J kg-1 for the hard axis ab-plane) near the Curie temperature for a magnetic field change of 9 T. The magneto-crystalline anisotropy constant Ku is estimated to be 486.92 kJ m-3 at 146 K, decreasing to 148.60 kJ m-3 at 168 K. Meanwhile, the maximum of the rotational magnetic entropy change ΔS\text M\text R(T, H) between the c-axis and the ab-plane is about 1.14 J kg-1K-1 for magnetic-field change of 9 T. The critical exponents are estimated by analyzing magnetocaloric effects, which indicate 2D-Ising type magnetic system. The accuracy of estimated critical exponents is verified by scaling analysis. The maximum magnetic entropy change -ΔS\text Mmax ≈5.25 J kg-1 K-1 (along the c-axis) and the corresponding adiabatic temperature change ΔTad ≈3.31 K (along the c-axis) are estimated by analyzing heat capacity measurements with a magnetic field up to 9 Tesla.