研究生: |
胡振興 Chen-Hsing Hu |
---|---|
論文名稱: |
利用同步輻射X光繞射與吸收光譜研究鐵鉑磁性合金磊晶薄膜之結構 Synchrotron X-ray Diffraction and EXAFS Determine the Structure of Epitaxial FePt Alloys Thin Film on MgO Substrates |
指導教授: |
李志浩
Chih-Hao Lee |
口試委員: | |
學位類別: |
碩士 Master |
系所名稱: |
原子科學院 - 工程與系統科學系 Department of Engineering and System Science |
論文出版年: | 2001 |
畢業學年度: | 89 |
語文別: | 中文 |
論文頁數: | 81 |
中文關鍵詞: | 垂直異向性 、序化參數 、磊晶薄膜 、磁光柯爾效應 、吸收光譜 、分子束磊晶 |
外文關鍵詞: | order parameter, PMA effect, epitaxial thin film, MOKE, EXAFS, MBE, FePt |
相關次數: | 點閱:1 下載:0 |
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本實驗中,我們藉由同步輻射X光的繞射結果及吸收光譜來分析磊晶FePt合金薄膜在不同成長溫度(250C∼650C)及不同成分比例成長(FePtx,x=0.8∼1.5)的序化程度與磁性的關係。這些樣品是以分子束磊晶法在Pt/MgO(100)基板上成長的。從實驗結果顯示,FePtx合金在x=1左右,形成L10的超晶格結構,其序化程度最高,而當成長溫度過低時(<350C),並不會形成L10結構,過高時(>650C )其垂直異向性也明顯消失。
The structure and magnetic properties of 100 nm thick epitaxial FePtx(001) alloy film,growth by MBE with x=0.8~1.5,and function of growth temperature(2500C∼650 0C). XRD data showed that when x~1,the alloy became L10 structure,the order parameter is the best,when the growth temperature below 250 0C, it couldn’t become the L10 , when growth temperature above 650 0C,the PMA effect also doesn’t exist
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