Multiple magnetic transitions and magnetocaloric effect of Tb_(4)Coln alloy  

作　　者：Remya U.D. Arun K. Swathi S. Athul S.R. Andrea Dzubinska Marian Reiffers Nagalakshmi R. 

机构地区：[1]Intermetallics and Non-linear Optics Laboratory,Department of Physics,National Institute of Technology,Tiruchirappalli,620015,India [2]CPM-TIP,University Pavol Jozef Safarik,04011,Košice,Slovakia [3]Faculty of Humanities and Natural Sciences,Presov University,Presov,Slovakia [4]Institute of Experimental Physics,SAS,Kosice,Slovakia

出　　处：《Journal of Rare Earths》2023年第11期1721-1727,I0003,共8页稀土学报（英文版）

基　　金：Project supported by the University Science Park TECHNICOM for Innovation Applications supported by Knowledge Technology (313011D232);supported by the Research&Development Operational Programme funded by the ERDF;VEGA1/0705/20,1/0404/21。

摘　　要：We report on the magnetic,magnetocaloric,thermal,and electrical transport properties of Tb_(4)Coln alloy,which crystallizes in two phases,Tb_6Co_(2.1)In_(0.8)(space group Immm)and Tb_(2)In_(0.9)Co_(0.1)(space group P6_(3)/mmc),respectively.The alloy reveals three successive magnetic transitions around T_(1)(163 K),T_(2)(50 K),and T_(3)(29 K),respectively,associated with paramagnetic to ferromagnetic transition and two sequential antiferromagnetic transitions.The low-temperature transition T_(3) follows the first-order magnetic behavior and exhibits the field-induced magnetic transition.Meanwhile,T_(2) and T_(1) are found to be second-order in nature which opens a possibility for hysteresis-free magnetocaloric application.The magnetocaloric properties are determined using different magnetocaloric figures of merits such as-ΔS_(M),ΔT_(ad).RCP,and TEC(10).Additionally,the universal curve behavior in the isothermal entropy change unveils the variation in critical exponents around T_(1) and T_(2) due to the magnetic inhomogeneity in the alloy.Besides,the electrical transport properties of the metallic alloy denote the maximum magnetoresistance of-10%around T_(1).

关 键 词：Multiple magnetic transitions Order of magnetic transition Magnetocaloric effect MAGNETORESISTANCE Universal curve behavior Rare earths 

分 类 号：TG1[金属学及工艺—金属学]