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La_1-xCa_xMnO₃纳米单晶丝的制备及磁热效应研究

Preparation and Magnetocaloric Effect of La_1-xCa_xMnO₃ Nanowires

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【Author】 WANG Zheng-de~2,ZHAO Hui-rong~1,ZHAO Wen-guang~1, REN Yong-gang~3,LI Xie~1,QIU Ju-feng~4,LI Bao-wei~1 (1. School of Materials Science and Engineering, UST Inner Mongolia,Baotou 014010,China; 2. School of Chemistry and Chemical Engineering,UST Inner Mongolia,Baotou 014010,China; 3.Institute of Metallurgical Engineering, Factory of 202, Baotou 014010,China; 4.Baotou Research Institute of Rare Earths,Baotou 014010,China)

【机构】内蒙古科技大学化学与化工学院；内蒙古科技大学材料科学与工程学院；二零二厂冶金研究所；包头稀土研究院；内蒙古科技大学材料科学与工程学院内蒙古　包头　014010；内蒙古　包头　014010；内蒙古　包头　014030；内蒙古　包头　014010；内蒙古　包头　014010；

【摘要】采用化学共沉淀法和热处理的方法制备了La1-xCaxMnO3(x=0.3,0.4,0.5)系钙钛矿型氧化物(LCMO),经XRD确定样品为钙钛矿型结构。TEM分析表明样品直径约为40nm的枝节状纳米丝,用△Tad-T测量仪测量了△Tad-T。与块状样品相比居里温度的波峰变宽,绝热磁温变降低。更多还原

【Abstract】 Nanowire samples La_1-xCa_xMnO₃（x=0.3,0.4,0.5） were prepared by co-precipitation method. XRD patterns showed that the samples after annealing are single perovskite-type phase. TEM photograph indicated that the average size of nanowire is 40 nm.The magnetocaloric effect of samples was measured directly.The result showed that △T is widen and decreased compared to the bulk samples of La_1-xCa_xMnO₃.更多还原