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研究生:陳文娟
研究生(外文):Wen-Chuang Chen
論文名稱:Ni80Fe20╱Ru╱Ni80Fe20三層膜磁耦合隨著Ru厚度變化之研究
論文名稱(外文):Studies of magnetic coupling vibration with Ru thickness Of Ni80Fe20╱Ru╱Ni80Fe20 sandwich
指導教授:黃榮俊黃榮俊引用關係
指導教授(外文):Jung-Chun-Andrew Huang
學位類別:碩士
校院名稱:國立成功大學
系所名稱:物理學系碩博士班
學門:自然科學學門
學類:物理學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:中文
論文頁數:86
中文關鍵詞:磁耦合反鐵磁
外文關鍵詞:magnetic couplingNiFe╱Ru╱NiFe
相關次數:
  • 被引用被引用:4
  • 點閱點閱:143
  • 評分評分:
  • 下載下載:17
  • 收藏至我的研究室書目清單書目收藏:0
摘 要
近來已經有許多關於鐵磁性材料透過非磁性物質產生交換耦合的研究,例如:Fe/Cr、Co/Cr、Co/Ru這些系統已經被廣泛的探討,在本實驗中我們成功的找到一個新的系統─ NiFe80Fe20/Ru/ NiFe80Fe20 trilayer,並利用MOKE的量測得到與前人相符合的振盪現象。
本實驗是利用MBE系統成長高品質的 NiFe80Fe20/Ru/ NiFe80Fe20 trilayers,討論此trilayers隨著Ru 厚度變化出現反鐵磁耦合振盪的情形。實驗中藉由 RHEED、x-ray繞射來探討其磊晶結構;LMOKE、VSM、SQUID來量測其磁性;AFM來觀察其原子表面型態。
Abstract
The oscillation of the interlayer coupling as a function of the spacer thickness has been extensively studied in recent years. In particular, Fe/Cr, Co/Cr, Co/Cu systems have been studied by different authors. In this work, we find a new trilayer system─NiFe80Fe20/Ru/ NiFe80Fe20 and the results in good agreement with oscillation behavior found in the other systems.
By molecular beam epitaxy (MBE),the author has prepared high-quality NiFe80Fe20/Ru/ NiFe80Fe20 trilayer .This thesis focus on the oscillation behavior of magnetic coupling as a function of the Ru thickness in Ni80Fe20╱Ru╱Ni80Fe20 trilayers. Reflection high-energy electron diffraction (RHEED) and X-ray diffraction (XRD) have been employed to study the epitaxial relation and surface of the trilayers structure. Longitudinal magneto-optical Kerr effect (LMOKE) and vibration sample Magnetometer (VSM) have been used to investigate the magneto-optical properties
第一章 簡介
1-1 前言………………………………………………………………………...1
1-2 磁性的起源………………………………………………………………...2
1-3 磁阻的簡介………………………………………………………………...4
1-4 GMR效應…………………………………………………………………..6
1-5 RKKY模型………………………………………………………………..12
1-6界面粗糙度………………………………………………………………..16
1-7異向性簡介………………………………………………………………..17
1-8異向性的量測……………………………………………………………..31
第二章 實驗儀器介紹
2-1分子束磊晶系統系統……………………………………………………...36
2-2 實驗量測儀器……………………………………………………………..42
第三章 實驗步驟
3-1 系統真空環境的準備……………………………………………………..59
3-2 基板的準備………………………………………………………………..60
3-3 樣品成長…………………………………………………………………..60
3-4 樣品量測…………………………………………………………………..61
第四章 實驗結果與討論
4-1 NiFe╱Ru╱NiFe三層膜於不同基板的成長結構與機制……………….64
4-2 改變Ru成長溫度對於NiFe╱Ru╱NiFe三層膜反鐵磁耦合的影響…71
4-3 改變Ru厚度對於NiFe╱Ru╱NiFe三層膜反鐵磁耦合的影響………75
4-4 在不同溫度下量測對於飽和場的影響………………………………….85
第五章 結論…………………………………………………………………….87
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