Highly Anisotropic Magnetism and Nearly Isotropic Magnetocaloric Effect in Mn_(3)Sn_(2)Single Crystals

查看全文 作　　者：Jianli [1,2]Bai;Qingxin [1,2]Dong;Libo [1,2]Zhang;Qiaoyu [1,2]Liu;Jingwen [1,2]Cheng;Pinyu [1,2]Liu;Cundong [1,2]Li;Yingrui [1,2]Sun;Yu [1,2]Huang;Zhian [1,2]Ren;Genfu [1,2,3]Chen 机构地区：[1]Institute of Physics and Beijing National Laboratory for Condensed Matter Physics,Chinese Academy of Sciences,Beijing 100190,China;[2]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;[3]Songshan Lake Materials Laboratory,Dongguan 523808,China 出　　处：《Chinese Physics Letters》索引2023年第40卷第12期,共6页 基　　金：supported by the National Natural Science Foundation of China(Grant No.12274440);the Strategic Priority Research Program(B)of Chinese Academy of Sciences(Grant No.XDB33010100);National Key R&D Program of China(Grant No.2022YFA1403903)。 摘　　要：Mn_(3)Sn_(2)has been proposed as an ideal material for magnetic refrigeration.It undergoes two successive ferromagnetic transitions(T_(C1)=262 K and T_(C2)=227 K)and one antiferromagnetic transition(TN=192 K).Herein we report,for the first time,the preparation of single crystals of Mn_(3)Sn_(2)from Bi flux.The resultant anisotropic magnetic properties and magnetocaloric effect are investigated along the three principal crystallographic directions of the crystal.Significant anisotropy of magnetic susceptibility and multiple field-induced metamagnetic transitions were found at low fields,whereas the magnetocaloric effect was found to be almost isotropic and larger than that of the polycrystalline one.The maximum magnetic entropy change amounts to-ΔSM=4.01 J·kg^(-1)·K^(-1)near T_(C1)under a magnetic field change of μ_(0)ΔH=5 T along the c-axis,with the corresponding refrigerant capacity of 1750 mJ·cm^(-3).Combined with a much wider cooling temperature span(~80 K),our results demonstrate Mn_(3)Sn_(2)single crystal to be an attractive candidate working material for active magnetic refrigeration at low temperatures. 关 键 词：TRANSITIONS Crystal ATTRACTIVE