研究生: |
許宏彰 |
---|---|
論文名稱: |
鐵超薄膜在白金(111)面上的成長 The growth mode of Fe ultrathin film on Pt(111) |
指導教授: | 沈青嵩 |
學位類別: |
碩士 Master |
系所名稱: |
物理學系 Department of Physics |
論文出版年: | 2007 |
畢業學年度: | 95 |
語文別: | 中文 |
論文頁數: | 104 |
中文關鍵詞: | 鐵 、鉑 、合金 、成長模式 、低能電子繞射 、歐傑電子能譜 |
英文關鍵詞: | Fe, Pt, Alloy, Growth Mode, LEED, AES |
論文種類: | 學術論文 |
相關次數: | 點閱:128 下載:8 |
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我們利用歐傑電子能譜(Auger Electron Spectroscopy, AES)、低能電子繞射(Low Energy Electron Diffraction, LEED)、以及紫外光電子能譜術(Ultraviolet Photoelectron Spectroscopy, UPS)來深入探討鐵超薄膜鍍於Pt(111) 的成長模式以及在高溫形成合金時的成份、結構變化。
室溫下,鐵薄膜鍍於Pt(111)的成長模式為三層平整成長之後再以三維島狀的S. K. mode。由AES、LEED均能得到相同的結論。而隨著厚度的增加也可以發現在表面有Domain Rotation的行為。因此在LEED Pattern出現了新的衛星亮點。
1,2 與 5 ML Fe/Pt(111)升溫過程各自在520、570與620 K開始在界面擴散;而在670、670與720 K時,開始有合金的行為;而對於2與5 ML的系統,在820與870 K時Domain Rotation的行為隨著溫度的昇高而消失。對於1 ML 深溫至1060 K時,由於表面的重構使得表面鉑原子間距加大,LEED Patternt出現新的(1x1)繞射亮點。
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