Structural and thermal characterization of Laub>5 ub>Caub>9 ub>Cuub>24 ub>Oub>41 ub> thin films grown by pulsed laser deposition on (1 1 0) SrTiOub>3 ub> substrates
- 作者：E. Svoukis
- 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 Laub>5 ub>Caub>9 ub>Cuub>24 ub>Oub>41 ub> thin films were grown by pulsed laser deposition on (1 1 0) SrTiOub>3 ub> 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 SrTiOub>3 ub> substrates and the Laub>5 ub>Caub>9 ub>Cuub>24 ub>Oub>41 ub> films grown at 700 掳C. The 3-蠅 method was used to measure the cross-plane thermal conductivity of Laub>5 ub>Caub>9 ub>Cuub>24 ub>Oub>41 ub> 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.