我们制备了氧化物材料Pr0.65Ca0.35Mn1-xFexO3(x=0,0.05,0.1,0.15),研究了材料的大磁阻效应.氧化物材料Pr0.65Ca0.35Mn1-xFexO3的居里温度及电阻峰位温度均随铁含量增加而下降,这主要是因为Fe离子不参加双交换作用,阻挡了双交换作用的进行,材料的铁磁作用随铁含量增加而减弱.镨氧化物材料Pr0.65Ca0.35Mn1-xFexO3(x≤0.15)的大磁阻效应在液氮温区较显著.
参考文献
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