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研究生:何建新
研究生(外文):Chien-Hsin Ho
論文名稱:FePt奈米微粒之製備與自組裝特性研究
論文名稱(外文):Synthesis and self-assembly of FePt nanoparticles
指導教授:賴志煌
指導教授(外文):Chih-Huang Lai
學位類別:碩士
校院名稱:國立清華大學
系所名稱:材料科學工程學系
學門:工程學門
學類:材料工程學類
論文種類:學術論文
論文出版年:2004
畢業學年度:92
語文別:中文
論文頁數:77
中文關鍵詞:磁性奈米微粒鐵鉑合金磁性記錄媒體
外文關鍵詞:magnetic nanoparticleFePtmagnetic recording media
相關次數:
  • 被引用被引用:15
  • 點閱點閱:201
  • 評分評分:
  • 下載下載:42
  • 收藏至我的研究室書目清單書目收藏:0
隨著電腦科技的日益發展,人們對於記錄密度的需求也日益增加。然而現今所使用的磁紀錄媒體也逐漸要達到它的物理極限,因此開發新型記錄媒體是目前重要的研究課題之一。利用FePt奈米微粒為主的奈米自組裝硬碟,由於具有高磁晶異向性,且能有效地降地紀錄雜訊,成為未來超高記錄密度媒體的熱門材料。

在本研究中,我們以化學合成法製備出FePt奈米微粒,微粒粒徑小於5 nm,並且研究顯示實驗參數的改變,會造成微粒粒徑和組成比例的變化。我們還利用以Fe(CO)5和Fe(acac)3兩種不同的起始劑來製備FePt奈米微粒,從中研究不同反應機制對於所合成出微粒性質的影響。而且第三元素Mn的適量添加會有助於提昇序化結構。透過使用不同溶劑和不同的溶劑濃度,可製備出FePt奈米微粒單層、雙層、和多層的自組裝排列。透過後退火的處理,我們研究其相變前後的結構與性質探討,以及不同退火氣氛的影響。
目錄

摘要…………………………………………………………Ⅰ
目錄…………………………………………………………Ⅱ
表目錄………………………………………………………Ⅳ
圖目錄………………………………………………………Ⅴ

第一章 序論…………………………………………………1
1-1 前言……………………………………………………………………………1
1-2 磁記錄媒體的發展與限制……………………………………………………1
1-3 研究動機………………………………………………………………………2
第二章 文獻回顧與理論背景………………………………3
2-1 磁性奈米微粒的特性…………………………………………………………3
2-1-1 單一磁區現象…………………………………………………………………………….4
2-1-2 矯頑場上升現象……………………………………………………………………….....5
2-1-3 超順磁行為……………………………………………………………………………….6
2-1-4 表面電子自旋不規則…………………………………………………………………….7
2-1-5 材料相變化……………………………………………………………………………….8
2-1-6 表面磁異向性能………………………………………………………………………….8
2-2 磁性奈米微粒的應用…………………………………………………………10
2-3 磁性奈米微粒在磁記錄方面的應用…………………………………………11
2-3-1傳統記錄媒體所面臨到的問題…………………………………………………………11
2-3-2自組裝磁性奈米微粒媒體的前景與挑戰………………………………………………12
2-4 FePt奈米微粒記錄媒體………………………………………………………14
2-4-1 FePt合金的特性…………………………………………………………………………14
2-4-2 FePt奈米微粒之製備……………………………………………………………………16
2-4-3 FePt奈米微粒之熱處理…………………………………………………………………19
2-4-4 FePt奈米微粒在不同氣氛下的序化……………………………………………………21
2-4-5 FePt奈米微粒尺寸與磁性質的關係……………………………………………………22
2-4-6 FePt奈米微粒之自組裝技術……………………………………………………………24
2-4-7 FePt奈米微粒之磁性質研究……………………………………………………………26
2-4-8 FePt奈米微粒的讀寫測試………………………………………………………………27
第三章 實驗方法與分析技術………………………………29
3-1 實驗流程………………………………………………………………………29
3-2 FePt奈米微粒合成方法………………………………………………………29
3-2-1 實驗裝置與設備圖……………………………………………………………………30
3-2-2 實驗用藥品……………………………………………………………………………31
3-2-3 實驗步驟………………………………………………………………………………31
3-3 奈米微粒為結構分析…………………………………………………………33
3-3-1 X光粉末繞射分析技術……………………………………………………………….33
3-3-2 穿透式電子顯微鏡分析………………………………………………………………35
3-3-3 X光能量分散光譜儀(EDX)……………………………………………………….37
3-4 磁性質分析……………………………………………………………………39
3-5 後退火處理……………………………………………………………………40
第四章 結果與討論…………………………………………41
4-1 FePt奈米微粒的製備…………………………………………………………41
4-1-1 不同FePt奈米微粒製備方法的比較…………………………………………………41
4-2 Mn添加對於FePt奈米微粒之結構與性質影響……………………………57
4-3 FePt奈米微粒的分散與自組裝………………………………………………63
4-2-1 溶液濃度與自組裝排列情形…………………………………………………………..66
4-4 FePt奈米微粒的熱處理與氧化………………………………………………68
4-3-1 FePt奈米微粒的氧化…………………………………………………………………...68
4-3-2 退火後之奈米微粒成長………………………………………………………………...71
第五章 結論…………………………………………………73
第六章 參考文獻……………………………………………74
[1] B. D. Cullity, “Introduction to Magnetic Materials”, Addison-Wesley, 1972
[2] J. Frenkel and J. Dorfman, Nature (London) 126, 274 (1930)
[3] A.H. Morrish, “The Physical Principles of Magnetism”, Wiley, New York, 1965
[4] Néel, Louis, “Influence des fluctuations thermiques sur l’aimantation de grains ferromagnétique trés fins,” Compt. Rend., 228, 664-666. (1949)
[5] Y. Labaye, et.al, JAP, 91, 8715, (2002)
[6] R Skomski, “Nanomagnetics”, J. Phys.: Condens. Matter, 15, R841, 2003
[7] R.H. Kodama, “Magnetic nanoparticles”, JMMM, 200, 359, 1999
[8] I. M. L Billas, A. Châtelain, W. A. de Heer, Science, 265, 1682, 1994
[9] I. M. L Billas, A. Châtelain, W. A. de Heer, JMMM, 168, 64, 1997
[10] A.J. Freeman, C.L. Fu, S. Ohnishi, M. Weinert, in: R. Feder(Ed.), Polarized Electrons in Surface Physics, World Scientific, Singapore, 1985, pp. 3-66
[11] R.H. Kodama, A.E. Berkowitz, E.J. McNiff Jr.,S. Foner, PRL, 77, 394, 1996
[12] R.H. Kodama, A.E. Berkowitz, E.J. McNiff Jr.,S. Foner, JAP, 81, 5552, 1997
[13] R.H. Kodama, A.E. Berkowitz, PRB, 59, 6321, 1999
[14] O. Kitakami, H. Sato, M. Tanaka, PRB, 56, 13849, 1998
[15] 張立德、牟季美。「奈米材料和奈米結構」滄海書局,九十一年。
[16] Q A Pankhurst, J Connolly, S K Jones and J Dobson, “Applications of magnetic nanoparticles in biomedicine”, J. Phys. D: Appl. Phys., 36, R167, 2003
[17] Andreas Moser, Kentaro Takano, David T Margulies, Manfred Albrecht, Yoshiaki Sonobe, Yoshihiro Ikeda, Shouheng Sun and Eric E Fullerton, “Magnetic recording: advancing into the future”, J. Phys. D: Appl. Phys., 35, R157, 2002
[18] K. Watanabe and H. Masumoto , Trans., JIM. 24, no.9, p.627,1983.
[19] K. Watanabe and H. Masumoto , Trans., JIM. 24, no.9, p.627,1983.
[20] Shouheng Sun, C. B. Murray, Dieter Weller, Liesl Folks, Andreas Moser, “Monodisperse FePt Nanoparticles and Ferromagnetic FePt Nanocrystal Superlattices”, Science, 287, 1989, 2000
[21] Shouheng Sun, Eric E, Fullerton, Dieter Weller, C.B Murray, “Compositionally Controlled FePt Nanoparticle Materials”, IEEE Trans.Magn. 37, 1239, 2001
[22] Shouheng Sun, Simone Anders, Thomas Thomson, J. E. E. Baglin, Mike F. Toney, Hendrik F. Hamann, C. B. Murray, and Bruce D. Terris, “Controlled Synthesis and Assembly of FePt Nanoparticles”, J. Phys. Chem. B , 107, 5419-5425, 2003
[23] Kevin E. Elkins, Tejaswi S. Vedantam, J. P. Liu, Hao Zeng, Shouheng Sun, Y. Ding, and Z. L. Wang, “Ultrafine FePt Nanoparticles Prepared by the Chemical Reduction Method”, Nano Letter, 3, 1647, 2003
[24] Elena V. Shevchenko, Dmitri V. Talapin, Heimo Schnablegger, Andreas Kornowski, Örjan Festin, Peter Svedlindh, Markus Haase, and Horst Weller, “Study of Nucleation and Growth in the Organometallic Synthesis of Magnetic Alloy Nanocrystals: The Role of Nucleation Rate in Size Control of CoPt3 Nanocrystals”, J. Am. Chem. Soc., 125, 9090-9101, 2003
[25] Hao Zeng, Shouheng Sun, T. S. Vedantam, J. P. Liu, Z.-R Dai, Z.-L Wang, “Exchange-coupled FePt nanoparticle assembly”, APL. 80, 2583, 2002
[26] Xiangcheng Sun, Shishou Kang, J. W. Harrell, and David E. Nikles, Z. R. Dai, J. Li, and Z. L. Wang, “Synthesis, chemical ordering, and magnetic properties of FePtCu nanoparticle films”, JAP, 93, 7337, 2003
[27] S. S. Kang, D. E. Nikles, and J. W. Harrell, “Synthesis, chemical ordering, and magnetic properties of self-assembled FePt–Ag nanoparticles”, JAP, 93, 7176, 2003
[28] Shishou Kang, Zhiyong Jia, David E. Nikles, and J. W. Harrell, “Synthesis, Self-Assembly, and Magnetic Properties of [FePt]1-x Aux Nanoparticles” , IEEE Trans.Magn. 39, 2753, 2003
[29] T. S. Vedantam, J. P. Liu, H. Zeng and S. Sun, “Thermal stability of self-assembled FePt nanoparticles”, JAP, 93, 7184, 2003
[30] Hiroyoshi Kodama, Satoru Momose, Nobutaka Ihara, Takuya Uzumaki, and Atsushi Tanaka, “Disk substrate deposition techniques for monodisperse chemically synthesized FePt nanoparticle media”, APL, 83, 5253, 2003
[31] Y. K. Takahashi, T. Ohkubo, M. Ohnuma, and K. Hono, “Size effect on the ordering of FePt granular films”, JAP, 93, 7166, 2003
[32] Y. K. Takahashi, T. Koyama, M. Ohnuma, T. Ohkubo, and K. Hono, “Size dependence of ordering in FePt nanoparticles”, JAP, 95, 2690, 2004
[33] G. A. Held, Hao Zeng, and Shouheng Sun, “Magnetics of ultrathin FePt nanoparticle films”, JAP, 95, 1481, 2004
[34] Shouheng Sun, Simone Anders, Hendrik F. Hamann, Jan-U. Thiele, J. E. E. Baglin, Thomas Thomson, Eric E. Fullerton, C. B. Murray, and Bruce D. Terris, “Polymer Mediated Self-Assembly of Magnetic Nanoparticles”, JACS, 124, 2882, 2002
[35] XiaoMin Yang, Chao Liu, Joachim Ahner, Jun Yu, Timothy Klemmer, Earl Johns, and Dieter Weller, “Fabrication of FePt nanoparticles for self-organized magnetic array”, J. Vac. Sci. Technol. B, 22, 31, 2004
[36] Kevin E. Elkins, Tejaswi S. Vedantam, J. P. Liu, Hao Zeng, Shouheng Sun, Y. Ding, and Z. L. Wang, “Ultrafine FePt Nanoparticles Prepared by the Chemical Reduction Method”, Nano Letter, 3 ,1647, 2003

[37] Taeghwan Hyeon, Su Seong Lee, Jongnam Park, Yunhee Chung, and Hyon Bin Na, “Synthesis of Highly Crystalline and Monodisperse Maghemite
Nanocrystallites without a Size-Selection Process”, J. Am. Chem. Soc., 123, 12798, 2001
[38] Shouheng Sun and Hao Zeng, “Size-Controlled Synthesis of Magnetite Nanoparticles”, J. Am. Chem. Soc., 124, 8204, 2002
[39] Chao Liu,* Xiaowei Wu, Timothy Klemmer, Nisha Shukla, Xiaomin Yang, and Dieter Weller, Anup G. Roy, Mihaela Tanase, and David Laughlin, “Polyol Process Synthesis of Monodispersed FePt Nanoparticles”, J. Phys. Chem. B, 108, 6121, 2004
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