薄膜
X射线光电子能谱
脉冲激光沉积
材料科学
退火(玻璃)
分析化学(期刊)
铁磁性
激光烧蚀
激光器
核磁共振
化学
光学
凝聚态物理
纳米技术
冶金
物理
色谱法
作者
Camelia N. Borca,Stela Canulescu,Francois Loviat,Thomas Lippert,Daniel Grolimund,M. Döbeli,J. Wambach,Alexander Wokaun
标识
DOI:10.1016/j.apsusc.2007.09.049
摘要
The electronic properties of La0.7Ca0.3MnO3−δ thin films grown by the pulsed reactive crossed beam laser ablation method are investigated. The effects of post-deposition annealing of epitaxial La0.7Ca0.3MnO3−δ thin films have been investigated using X-ray photoelectron spectroscopy (surface sensitive) and hard X-ray absorption spectroscopy (bulk sensitive). The films deposited in the high vacuum are oxygen deficient and contain mostly Mn3+. High temperature annealing in a flowing oxygen atmosphere partially changes the Mn oxidation state from +3 towards +3.4. These changes should favor a metal-like conduction and a ferromagnetic double exchange transport mechanism in the annealed thin films.
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