Critical behavior and magnetocaloric effect in Mn3Si2Te6

Article

关键词: CHROMIUM HEXATELLUROSILICATE CR2SI2TE6;    CRYSTAL-STRUCTURE;    FERROMAGNETIC INSULATOR;    NANOSHEETS;    CRSITE3;   

DOI  :  10.1103/PhysRevB.98.064423

来源: SCIE

【 摘 要 】

The critical properties and magnetocaloric effect of semiconducting ferrimagnet Mn3Si2Te6 single crystals have been investigated by bulk magnetization and heat capacity around Critical exponents beta = 0.41 +/- 0.01 with a critical temperature T-c = 74.18 +/- 0.08 K and gamma = 1.21 +/- 0.02 with T-c = 74.35 +/- 0.05 K are deduced by the Kouvel-Fisher plot, whereas delta = 4.29 +/- 0.05(3.40 +/- 0.02) is obtained by a critical isotherm analysis at T = 74(75)K. The magnetic exchange distance is found to decay as J(r) approximate to r(-4.79), which lies between the mean-field and 3D Heisenberg models. Moreover, the magnetic entropy change -Delta S-M features a maximum at T-c, i.e., -Delta S-M(max) similar to 2.53(1.67) J kg(-1) K-1 with in-plane (out-of-plane) field change of 5 T, confirming large magnetic anisotropy. The heat capacity measurement further gives -Delta S-M(max)similar to 2.94 J kg(-1) K-1 and the corresponding adiabatic temperature change Delta T-ad similar to 1.14 K with out-of-plane field change of 9 T.

【 授权许可】

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