| 衬底温度和生长氧压对La0.67Sr0.33MnO3:Ag0.08薄膜激光感生电压效应的影响 |
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| 引用本文： | 晏益志,殷学鹏,刘翔,陈清明.衬底温度和生长氧压对La0.67Sr0.33MnO3:Ag0.08薄膜激光感生电压效应的影响[J].无机材料学报,2014,29(7):753-757. |
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| 作者姓名： | 晏益志 殷学鹏 刘翔 陈清明 |
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| 作者单位： | (昆明理工大学 材料科学与工程学院, 昆明 650093) |
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| 基金项目： | 国家自然科学基金(50974066);云南省自然科学基金(2009ZC013M);昆明理工大学人才培养基金(KKZ3201351012)~~ |
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| 摘 要： | 通过化学共沉淀法制备了La0.67Sr0.33MnO3:Ag0.08 (LSMO:Ag0.08)多晶材料, 然后采用脉冲激光沉积(PLD)技术在LaAlO3 (LAO)倾斜衬底上制备了LSMO:Ag0.08薄膜。研究了衬底温度和生长氧压对薄膜结构、电输运特性及激光感生电压(LIV)效应的影响。结果表明: 当衬底温度为790℃、生长氧压为45 Pa时, 薄膜具有最大峰值电压(Up)、优值(Fm)和各向异性Seebeck系数(ΔS); 在优化的衬底温度和生长氧压条件下, 长程Jahn-Teller协变引起ΔS数值提高, 这是LIV信号增强的主要原因。
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| 关 键 词： | 衬底温度 生长氧压 脉冲激光沉积 激光感生电压 Seebeck系数 |
| 收稿时间： | 2013-10-29 |
| 修稿时间： | 2014-01-10 |
Influence of Growth Temperature and Oxygen Pressure on Laser-induced Voltage Effect of La0.67Sr0.33MnO3:Ag0.08 Thin Films |
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| YAN Yi-Zhi,YIN Xue-Peng,LIU Xiang,CHEN Qing-Ming.Influence of Growth Temperature and Oxygen Pressure on Laser-induced Voltage Effect of La0.67Sr0.33MnO3:Ag0.08 Thin Films[J].Journal of Inorganic Materials,2014,29(7):753-757. |
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| Authors: | YAN Yi-Zhi YIN Xue-Peng LIU Xiang CHEN Qing-Ming |
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| Affiliation: | (Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China) |
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| Abstract: | La0.67Sr0.33MnO3:Ag0.08 (LSMO:Ag0.08) polycrystalline ceramics were prepared by chemical co-precipitation method, and then La0.67Sr0.33MnO3:Ag0.08 thin films were prepared on vicinal cut LaAlO3 (LAO) substrates by pulsed laser deposition (PLD) technique. Effects of growth temperature and oxygen pressure on structure, electrical transport properties and laser-induced voltage (LIV) effect were investigated. The results show that the maximum LIV peak (Up), the figure of merit (Fm) and anisotropy Seebeck coefficient (ΔS) are obtained for LSMO:Ag0.08 thin films when growth temperature and oxygen pressure are 790 ℃ and 45 Pa, respectively. The LIV enhancement of LSMO:Ag0.08 thin films is due to the anisotropy of the Seebeck coefficient, which is produced by long range cooperative Jahn-Teller distortions under optimal growth temperature and oxygen pressure conditions. |
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| Keywords: | growth temperature oxygen pressure pulsed laser deposition laser-induced voltage anisotropic Seebeck coefficient |
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