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王岛,马垒,赵世谦,郭永斌.Co1.2Mn0.8B化合物的磁性能与磁热效应[J].稀有金属材料与工程(英文),2018,47(9):2782~2786.[Wang Dao,Ma Lei,Zhao Shiqian and Guo Yongbin.Magnetic Properties and Magnetocaloric Effect of Co1.2Mn0.8B Compound[J].Rare Metal Materials and Engineering,2018,47(9):2782~2786.]
Magnetic Properties and Magnetocaloric Effect of Co1.2Mn0.8B Compound
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Received:November 15, 2016  Revised:January 06, 2017
DOI:
Key words: Co1.2Mn0.8B compound  Curie temperature  Magnetic properties  Magnetic entropy change
Foundation item:国家重点基础研究发展计划项目(2014CB643703);广西信息材料重点实验室项目(161011-Z);桂林电子科技大学-中铝广西有色金源稀土有限公司研究生联合培养基地专项经费资助项目(20160513-11-Z);国家自然科学基金(51461012),广西自然科学基金(2016GXNSFAA380030)
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Wang Dao,Ma Lei,Zhao Shiqian and Guo Yongbin  
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Abstract:
      In this paper, the Co1.2Mn0.8B compound was prepared by ball milling and solid state reaction. The crystal structure, magnetic properties and magnetocaloric effect of Co1.2Mn0.8B compound have been investigated. The results show that the phase structure of the compound is Co2B single phase with the CuAl2-type tetragonal crystal structure, space group of I14/mcm. The Co1.2Mn0.8B compound undergone second-order magnetic phase transitions from ferromagnetic (FM) state to paramagnetic (PM) state in the vicinity of Curie temperature of 175K, and the thermal hysteresis is about 0.7 K. The maximal magnetic-entropy change (ΔSM) of the compound reaches to 1.17 J/kg.K in an external magnetic field of 0~5.0 T. and the temperature corresponding to ΔSMdoes not change with the variation of the external field. The material has a potential value in the field of magnetic refrigeration and magnetic heat sensor.