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. Remya U.D.;Arun K.;Swathi S.;Athul S.R.;Andrea Dzubinska;Marian Reiffers;Nagalakshmi R.

作者机构：Intermetallics and Non-linear Optics LaboratoryDepartment of PhysicsNational Institute of TechnologyTiruchirappalli620015India CPM-TIPUniversity Pavol Jozef Safarik04011KošiceSlovakia Faculty of Humanities and Natural SciencesPresov UniversityPresovSlovakia Institute of Experimental PhysicsSASKosiceSlovakia 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2023年第41卷第11期

页      面：1721-1727,I0003页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0702[理学-物理学] 

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。 

主　　题：Multiple magnetic transitions Order of magnetic transition Magnetocaloric effect Magnetoresistance Universal curve behavior Rare earths 

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).