Structural and thermal characterization of La₅Ca₉Cu₂₄O₄₁ thin films grown by pulsed laser deposition on (1 1 0) SrTiO₃ substrates

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• 作者：E. Svoukis^a ; ^{esvouk01@ucy.ac.cy} ; G.I. Athanasopoulos^a ; Th. Altantzis^b ; Ch. Lioutas^b ; R.S. Martin^c ; A. Revcolevschi^c ; J. Giapintzakis^a ; ^{giapintz@ucy.ac.cy}
• 关键词：Thin films ; La5Ca9Cu24O41 ; 3-蠅 method ; Pulsed laser deposition
• 刊名：Thin Solid Films
• 出版年：2012
• 期刊代码：78_00406090
• 类别：ph
• 出版时间：1 May, 2012
• 卷：520
• 期：14
• 页码：4613-4616
• 文件大小：620 K

摘要

In the present study stoichiometric, b-axis oriented La₅Ca₉Cu₂₄O₄₁ thin films were grown by pulsed laser deposition on (1 1 0) SrTiO₃ substrates in the temperature range 600-750 掳C. High resolution transmission electron microscopy was employed to investigate the growth mechanism and the epitaxial relationship between the SrTiO₃ substrates and the La₅Ca₉Cu₂₄O₄₁ films grown at 700 掳C. The 3-蠅 method was used to measure the cross-plane thermal conductivity of La₅Ca₉Cu₂₄O₄₁ films in the temperature range 50-350 K. The observed glass-like behavior is attributed to atomic-scale defects, grain boundaries and an interfacial layer formed between film and substrate.