Magnetic properties and magnetic entropy changes of MRE2Co7 compounds

• Published in: Science China. Physics, mechanics & astronomy Vol. 58; no. 9; pp. 86 - 89
• Main Authors: Zhong, XiChun, Liu, ZhongWu, Min, JiXiong, Tian, HuaCun, Gschneidner, Karl A., Pecharsky, Vitalij K.
• Format: Journal Article
• Language: English
• Published: Beijing Science China Press 01.09.2015; Springer Nature B.V
• Subjects: Astronomy; Classical and Continuum Physics; Coercivity; Magnetic properties; Observations and Techniques; Physics; Physics and Astronomy; Refrigeration; X ray powder diffraction; X-ray diffraction; X射线粉末衍射; X射线衍射; 交流磁化率; 化合物; 居里温度; 强度测量; 磁性能; 磁熵变; Ce; Pr; La; magnetic entropy change; ); Co; magnetic property; compound
• ISSN: 1674-7348; 1869-1927
• DOI: 10.1007/s11433-015-5656-9

（La0.5Ce0.5）2Co7 and（Ce0.65Pr0.35）2Co7 compounds for magnetic refrigeration were studied by X-ray diffraction, ac susceptibility and isothermal magnetization measurements. X-ray powder diffraction shows that all the compounds have hexagonal Ce2Ni7-type structure. The Curie temperatures（TC） are 258 K and 222 K for（La0.5Ce0.5）2Co7 and（Ce0.65Pr0.35）2Co7 compounds, respectively. High coercivities（HC） of about 1.74 and 6.61 k Oe at 5 K with a smooth demagnetization curves were obtained for the（La0.5Ce0.5）2Co7 and（Ce0.65Pr0.35）2Co7 compounds, respectively. For an applied field change from 0 to 50 k Oe, the maximum（？？SM） for（La0.5Ce0.5）2Co7 and（Ce0.65Pr0.35）2Co7 compounds are 0.52 and 0.67 J/（kg K）, respectively.