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李致朋,区定容,叶飞.Fe-Co薄膜与Al2O3 基体相互扩散和相互作用相关的微观结构演变[J].稀有金属材料与工程(英文),2021,50(5):1556~1562.[Li Zhipeng,Ou Dingrong and Ye Fei.Interdiffusion and Interaction Associated Microstructure Evolution Between Fe-Co Thin Film and Al2O3 Substrate[J].Rare Metal Materials and Engineering,2021,50(5):1556~1562.]
Interdiffusion and Interaction Associated Microstructure Evolution Between Fe-Co Thin Film and Al2O3 Substrate
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Received:February 15, 2020  
DOI:
Key words: Fe-Co alloy  interdiffusion  interface  microstructure  transmission electron microscope
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Author NameAffiliation
Li Zhipeng,Ou Dingrong and Ye Fei  
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Abstract:
      By advanced analytical transmission electron microscope, an unexpected interdiffusion between magnetron sputtered Fe-Co thin film and Al2O3 substrate was detected and systematically investigated in this study. Results show that a new phase of spinel FeAl2O4 forms, leading to the formation of interfacial layer. Detailed microstructure characterization reveals the interdiffusion associated with incommensurate structure formation near the interface in the Fe-Co thin film. The interdiffusion and accompanied new phase formation between the Fe-Co thin film and sapphire substrate are detected, and the associated microstructure evolution at the interfacial region is discussed, which may considerably influence the thin film magnetic properties.