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理學院
物理學系
學位論文
學位論文
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http://rportal.lib.ntnu.edu.tw/handle/20.500.12235/73905
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search.filters.author.Chen, Yi-Hua
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search.filters.author.陳宜樺
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search.filters.subject.alloy
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search.filters.subject.hydrogenation
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search.filters.subject.Magnetism
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search.filters.subject.thin film
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search.filters.subject.合金
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透過氫氣作用控制磁性層間交互耦合效應
(
2017
)
陳宜樺
;
Chen, Yi-Hua
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長期以來,鈀一直作為氫氣解離和吸附的高效催化劑。在鈀合金或內米結構中,鈀的氫化容易引起相鄰材料有顯著的鄰近效應。在本實驗中,我們在超高真空中使用電子束蒸發磊晶法,在MgO (001)的基底上製備了磁性界面耦合系統。通過退火處理,可以得到平坦的MgO (001)表面,用來沉積Fe/Pd/Fe三層膜。 在一定鈀的厚度下,通過磁光柯爾效應在平行(In-Plane)方向,可以在Fe/Pd/Fe/MgO(001)系統中觀察到清楚的雙磁滯曲線。這現象說明頂層和底層鐵層之間的反鐵磁耦合。隨著室溫下的氫氣脫吸附,反鐵磁層間耦合有明顯的變化,如雙磁滯曲線的矯頑場變化所示。這結果表示,鐵/鈀多層膜系統未來可以應用為敏感性高的氫氣感測GMR傳感器
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