| 钙钛矿La0.75 Na0.25 MnO3外延膜的制备及磁电特性研究 |
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| 引用本文： | 朱金山,韩立安.钙钛矿La0.75 Na0.25 MnO3外延膜的制备及磁电特性研究[J].宝鸡文理学院学报(自然科学版),2010,30(2):21-23,46. |
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| 作者姓名： | 朱金山 韩立安 |
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| 作者单位： | 西安科技大学,理学院,陕西,西安,710054;西安科技大学,理学院,陕西,西安,710054 |
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| 基金项目： | 陕西省自然科学基金资助 |
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| 摘 要： | 目的 研究单价碱金属Na替代对钙钛矿LaMnO3结构及磁电特性的影响.方法 通过射频磁控溅射在单晶LaAlO3(100)衬底上生长了膜厚为120 nm的La0.75Na0.25MnO3外延膜,用X射线衍射仪、原子力和超导量子干涉仪、直流四探针法对其进行了表征.结果 结果表明,薄膜为赝立方钙钛矿结构,具有良好的单晶外延结构和岛状生长模式.居里温度Tc=270 K,在居里温度附近,发生铁磁-顺磁转变.此材料呈现出一种典型的自旋玻璃特性,是由于应力造成的.在1 T磁场下,磁电阻极大值为40.3%.结论 La0.75Na0.25MnO3外延膜的制备为CMR薄膜的低场和室温条件下的广泛应用提供了潜在的价值.
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| 关 键 词： | La0.75Na0.25MnO3外延膜 磁性 磁电阻 |
Preparation as well as magnetic and electrical properties of La0.75 Na0.25 MnO3 epitaxial film |
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| ZHU Jin-shan,HAN Li-an.Preparation as well as magnetic and electrical properties of La0.75 Na0.25 MnO3 epitaxial film[J].Journal of Baoji College of Arts and Science(Natural Science Edition),2010,30(2):21-23,46. |
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| Authors: | ZHU Jin-shan HAN Li-an |
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| Institution: | ZHU Jin-shan,HAN Li-an(College of Science,Xi'an University of Science and Technology,Xi'an 710054,Shaanxi,China) |
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| Abstract: | Aim In order to investigate the influence of univalent alkaline metal Na doping on the structure as well as magnetic and electrical properties of perovskite LaMnO3.Methods Using RF magnetron sputtering method,La0.75Na0.25MnO3 thin films have been epitaxially grown on(100) LaAlO3 single-crystal substrates.The thin film was characterized with the method of X ray diffraction,atomic force micrograph,superconducting quantum interference device and d.c.four-probe.Results The result shows that the film has a good ... |
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| Keywords: | La0 75Na0 25MnO3 epitaxially film magnetic property magnetoresistance |
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