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LaGd_(0.1)Fe_(11.4-x)Co_xSi_(1.6)(x=0.1,0.3,0.5,0.7,0.9)合金的磁热效应 被引量:3

Magnetocaloric Effect of LaGd_(0.1)Fe_(11.4-x)Co_xSi_(1.6)(x=0.1,0.3,0.5,0.7,0.9) Alloys
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摘要 研究了LaGd0.1Fe11.4-xCoxSi1.6(x=0.1,0.3,0.5,0.7,0.9)系列合金的结构以及磁热效应。室温XRD分析表明该系列合金除微量的α-Fe相外,均具有立方NaZn13型立方单相晶体结构,空间群为Fm-3c。晶格常数没有明显变化,分别为1.1458,1.1454,1.1458,1.1459,1.469nm。磁性测量表明该系列合金的Tc随着Co含量的增加而增加,分别为212,231,253,281,302K。在外磁场变化ΔB=1.5T时,最大的磁熵变随着Co含量的增加而减少,由x=0.1的13.8J降为x=0.9J.kg-.1K-1的1.5J.kg-.1K-1。并且随着Co含量的增加存在由一级相变转为二级相变的趋势。 The effect of substitution of Co for Fe on the structure,magnetic properties and magnetic entropy changes in LaGd0.1Fe11.4-xCoxSi1.6(x=0.1,0.3,0.5,0.7,0.9) was investigated. The X-ray diffraction showed that LaGd0.1Fe11.4-xCoxSi1.6(x=0.1,0.3,0.5,0.7,0.9) alloys consisted of the NaZn13-type phase(Fm-3c) and minor amount of α-Fe phase. There were no obvious changes of cell constants,1.1458,1.14549,1.1458,1.1459,1.469 nm for x=0.1,0.3,0.5,0.7 and 0.9,respectively. Magnetic measurements showed that the Curie te...
出处 《稀有金属》 EI CAS CSCD 北大核心 2010年第1期128-132,共5页 Chinese Journal of Rare Metals
基金 国家自然科学基金资助项目(50661004) 内蒙古自治区自然科学基金重大项目(20080404ZD09) 内蒙古师范大学研究生创新基金项目(CXJJS08022)
关键词 合金 磁热效应 磁熵变 居里温度 alloy magnetocaloric effect magnetic entropy change Curie temperature
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