低温大比热磁性金属的研究  

Research on Magnetic Metallic with Large Specific Heat at Low Temperature

作　　者：张海玲 

机构地区：[1]内蒙古乌海职业技术学院化工系,内蒙古乌海016000

出　　处：《铸造技术》2014年第12期2827-2829,2832,共4页Foundry Technology

摘　　要：采用Al和Ga分别替代Er0.65Ho0.35In3和Er In3中的In,获得了新磁性材料,并研究了该材料的结构、磁性和比热。结果表明,采用Al替代Er0.65Ho0.35In3中的In后,没有形成单相的二元化合物Er0.65Ho0.35(In1-xAlx)3,不能形成磁性合金化合物。采用Ga替代Er In3中的In后,形成了单相的二元化合物Er(In1-xGax)3。Er(In1-xGax)3(x=0.1)在奈尔温度处有较大的比热峰值,比热半峰宽对应的温度范围较大,可作为温度为5 K附近使用的低温蓄冷材料。The new magnetic, material was obtained by replacing In of Er0.65Ho0.35In3 and ErIn3 using Al and Ga respectively, and the phase structure, magnetism and specific heat of the materials were investigated. The results show that a single-phase binary compound Er0.65-Ho0.35 （In1-xAlx）3 is not formed after replacing In of Er0.65Ho0.35In3 by Al, and thus a magnetic alloy is nonexistent. While the single-phase binary compound Er（In1-xGax）3 is formed after replacing In of ErIn3 by Ga. Er（In1-xGax）3 （x=0.1） has a large specific heat peak at Neel temperature, and the half-peak width of specific heat and the corresponding temperature range are larger, which can be used as low-temperature cool storage material near 5 K.

关 键 词：磁性蓄冷材料 结构 磁性能 比热 

分 类 号：TM271[一般工业技术—材料科学与工程]