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La1-xPrxMnO3(x=0·1,0·2)薄膜庞磁电阻性质的研究
Colossal magnetoresistance effect in the perovskite-type La1-xPrxMnO3 thin films
【摘要】 一种新的庞磁电阻氧化物薄膜La1-xPrxMnO3(x=0.1,0.2)薄膜用脉冲激光沉积(PLD)方法生长在(100)SrTiO3单晶基底上.XRD结果显示薄膜具有很好的外延单晶取向.电输运和磁性质的研究表明薄膜具有显著的庞磁电阻效应(CMR)效应,其中磁电阻比率达95%(在5T的磁场下).X射线光电子能谱(XPS)的结果表明薄膜体系中Pr离子的价态为+4价,因此该薄膜很可能是电子掺杂的庞磁电阻体系.
【Abstract】 The oxide La1-xPrxMnO3 (x=0.1, 0.2) thin film showing colossal magnetoresistance has been epitaxially grown on (100) SrTiO-3 single-crystal substrate by pulsed-laser deposition. The films have a perovskite structure and perform the colossal magnetoresistance effect with the maximum magnetoresistance ratio of 95% under the magnetic field of 5 T. The valence of Pr is confirmed as +4 through XPS. Therefore the epitaxial film is most likely an electron-doped colossal magnetoresistance fihn.
【关键词】 脉冲激光沉积;
La1-xPrxMnO3;
电子掺杂;
庞磁电阻;
【Key words】 pulsed laser deposition (PLD); La1-xPrxMnO3; electron-doped; colossal magnetoresistance;
【Key words】 pulsed laser deposition (PLD); La1-xPrxMnO3; electron-doped; colossal magnetoresistance;
- 【文献出处】 物理学报 ,Acta Physica Sinica , 编辑部邮箱 ,2006年03期
- 【分类号】O484.43
- 【被引频次】3
- 【下载频次】120