| 微纳米加工技术对La2/3Ca1/3MnO3材料性能影响的研究 |
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| 引用本文： | 伍展文,李洁,阳运国,黎松林,郑东宁.微纳米加工技术对La2/3Ca1/3MnO3材料性能影响的研究[J].低温物理学报,2012(2):101-104. |
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| 作者姓名： | 伍展文 李洁 阳运国 黎松林 郑东宁 |
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| 作者单位： | 广东电网公司中山供电局试验研究所;中国科学院物理研究所超导国家重点实验室 |
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| 摘 要： | 利用脉冲激光沉积(PLD)方法制备了La2/3Ca1/3MnO3(LCMO)外延薄膜.然后利用微纳米加工技术对LCMO薄膜材料进行了局部改造,制造出宽度仅为83纳米的弱联接结构,并对此进行了一系列的物性改变研究.发现在测量电流不变(1μA)的情况下,R～T曲线在120K附近有一个尖锐的跳变,跳变的温度区间很窄.此外,测量电流和外加磁场的增加,都能对跳变现象产生抑制作用.目前认为这种现象的产生是由于相分离的原因导致的.
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| 关 键 词： | 脉冲激光沉积 微纳米加工 相分离 |
EFFECT OF MICRO-NANOFABRICATION TECHNOLOGIES IN La2/3Ca1/3MnO3 THIN FILMS |
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| WU Zhan-wen,LI Jie,YANG Yun-guo,LI Song-lin,ZHENG Dong-ning.EFFECT OF MICRO-NANOFABRICATION TECHNOLOGIES IN La2/3Ca1/3MnO3 THIN FILMS[J].Chinese Journal of Low Temperature Physics,2012(2):101-104. |
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| Authors: | WU Zhan-wen LI Jie YANG Yun-guo LI Song-lin ZHENG Dong-ning |
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| Institution: | 1Institute of Testing and Research,Zhongshan Power Supply Bureau,Guangdong Power Grid Corporation,Zhongshan,China,528400; 2National Key Laboratory for Superconductivity,Institute of Physics,Chinese Academy of Sciences,Beijing,China,100080 |
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| Abstract: | La2/3Ca1/3MnO3(LCMO) and YBa2Cu3O7(YBCO,The superconducting material is the key point of the superconducting electrical power technology.) are the same type materials of the strongly correlated systems.This LCMO material belongs to the doped perovskite oxides of the type R1-xAxMnO3(R=La,Nd,etc.,a trivalent rare earth element and A=Ca,Sr,etc.,a divalent element).Formerly,the colossal magnetoresistance(CMR) have attracted great interest in these materials.In order to investigate the origin of this mechanism,vast research has been studied. However,whether the characteristics of this LCMO material can be changed if it was modified by some special method? The LCMO thin films were modified by using Micro-nanofabrication technologies.We present in this article the investigation on the result. |
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| Keywords: | pulse laser deposition micro-nanofabrication phase-separation |
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