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Chemical Oxidation of La2CuO4 Epitaxial Thin Films Grown by Pulsed Laser Deposition |
| WANG Chun-Chang;YAN Yun-Jie;ZHU Jing |
| Beijing National Center for Electron Microscopy, Tsinghua University, Beijing 100084Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084 |
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WANG Chun-Chang, YAN Yun-Jie, ZHU Jing 2007 Chin. Phys. Lett. 24 1674-1677 |
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Abstract Chemical oxidation is used to induce superconductivity in La2CuO4 expitaxial thin films fabricated by pulsed laser deposition technique. Details about the influence of oxidation time on structural, surface morphology, Raman spectra, and electrical properties have been investigated. The results convince that successful uptake of oxygen occurs in the oxidized films, and the content of the inserted oxygen increases with increasing oxidation interval. The possible mechanism for the excess oxygen insertion into the film is also discussed.
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| Keywords:
68.55.Jk
74.78.Bz
82.40.-g
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Received: 23 January 2007
Published: 17 May 2007
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