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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 張嘉升(Chia-Seng Chang) | |
dc.contributor.author | Jia-Wei Xin | en |
dc.contributor.author | 忻佳緯 | zh_TW |
dc.date.accessioned | 2021-05-20T21:52:39Z | - |
dc.date.available | 2011-07-30 | |
dc.date.available | 2021-05-20T21:52:39Z | - |
dc.date.copyright | 2010-07-30 | |
dc.date.issued | 2010 | |
dc.date.submitted | 2010-07-28 | |
dc.identifier.citation | 1. Madey, Theodore E.; Guan, J.; Nien, C.-H.; Dong, C.-Z.; Tao, H.-S.; Campbell, R. A., Surface Review and Letters, Vol. 3, Issue 02(1996), 1315-1328.
2. Faceting of W(111) induced by Fe, Pd thin films and adsorption of hydrogen and CO on these surfaces, Chang-Han and Huang and K. J. Song, NTU Institutional Repository, http://ntur.lib.ntu.edu.tw/handle/246246/181081 3. T.E. Madey, C.-H. Nien et al, Surface Science, 438(1999), 191. 4. C.-H. Nien and T.E. Madey, Surface Science, 380(1997), L527. 5. The growth of pyramidal structure on Pd covered W tip and research on relative atomic processes, Lung-Chieh Cheng and Tsu-Yi Fu, National Taiwan Normal University Electronic Theses & Dissertations, http://etds.lib.ntnu.edu.tw/cgi-bin/gs/ntnugsweb.cgi?o=dntnucdr&i=sid=%2290NTNU0198012%22.&searchmode=basic 6. Thermal desorption from metal surfaces: A review, David A. King, Surface Science, Vol. 47, Issue 1(1975), 384-402. 7. The electron attenuation length revisited, A. Jablonski and C. J. Powell, Surface Science Reports, Vol. 47, Issues 2-3(2002), 33-91. 8. Values are calculated by NIST Standard Reference Database 82, NIST Electron Effective-Attenuation-Length Database. 9. Wikipedia: Stranski-Krastanov growth, http://en.wikipedia.org/wiki/Stranski-Krastanov_growth 10. The Co-Pd (Cobalt-Palladium) System, K. Ishida and T. Nishizawa, Journal of Phase Equilibria, Vol. 12, No. 1(1991), 84. 11. Thermal Processing Technology Center, http://tptc.iit.edu/Center/research/PhaseDiagram/Content/result/Al-Ni-Pd%20system/Ni-Pd.gif | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/10717 | - |
dc.description.abstract | 在本研究中我們探討了鎳、鈷簿膜在鈀�鵭{112}縐化表面之熱穩定性與熱動力學特性。我們發現在熱退火後鎳和鈷都會與鈀在表面形成合金,而令人驚訝的是,其中鎳可以幫助鈀在鎢(111)表面引發縐化現象。另外11個熱脫附單層的鈷和1.2個熱脫附單層的鈀薄膜在熱退火後的低能量電子繞射圖形只顯示出相當微弱的{112}面繞射點,且沒有原先(111)面的繞射點。程控溫歐傑電子能譜顯示大於一個熱脫附單層的鈷、鎳薄膜在熱處理過程中均會形成三維島狀結構,表示這些較厚的膜在縐化表面並不是穩定的,而不能作為製備磁性單原子針尖的方法。但從這些實驗中我們發現小於一個熱脫附單層的鎳薄膜在(鎳,鈀)�鎢(111)表面具有良好的熱穩定性,這些系統仍有相當的潛力且值得在未來做更進一步的磁性量測。 | zh_TW |
dc.description.abstract | We studied the thermal stability and thermodynamic properties of Ni, Co ultra thin films on faceted Pd/W{112} system. We found that both Ni and Co will form alloy with Pd upon annealing. To our surprise, the Ni is able to “help” Pd in inducing the faceting of W(111) surface. As for Co, after deposition and annealing of up to 11 TML of Co on 1.2 TML of Pd, faint LEED spots from {112} faceted surface always persist on top of a diffuse background, while no LEED spots from planar (111) surface is ever observed. Temperature programmed Auger spectra show thick films (>1TML) of Co and Ni tend to form 3D islands on the faceted surface upon annealing, indicating such uniform thick films on faceted Pd / W{112} system to be thermodynamically unstable and unlikely candidates for forming magnetic single atom tips. We do find that some of the thin (<1 TML) Ni films on faceted (Ni, Pd) / W{112} has good meta-stability. These are the systems in which there is still hope and warrants a MOKE measurement in the future. | en |
dc.description.provenance | Made available in DSpace on 2021-05-20T21:52:39Z (GMT). No. of bitstreams: 1 ntu-99-R97222037-1.pdf: 7242938 bytes, checksum: 44cd58323a63e82dea4a28acd6896fd1 (MD5) Previous issue date: 2010 | en |
dc.description.tableofcontents | 口試委員會審定書......ii
誌謝......iii 中文摘要......iv Abstract......v List of figures.......vii Chapter 1 Introduction......1 1.1 Motivation......1 1.2 Faceting phenomenon of Pd/W(111) surface......2 Chapter 2 Experiment......5 2.1 Experimental apparatus......5 2.2 Experimental method......6 Chapter 3 Results & Discussion......7 3.1 Ni / W(111) and Co / W(111) system......7 3.1.1 TPD spectrum and thickness calibration of Ni......7 3.1.2 Electron attenuation length of Ni......10 3.1.3 TPD spectrum and thickness calibration of Co......12 3.2 A quick survey on Co / Pd / W(111) system......13 3.3 The Ni / Pd / W(111) system......25 3.3.1 Thermal stability of Ni on Pd / W{112} faceted surface......25 3.3.2 Ni and the faceting phenomenon of Pd / W(111) ......34 3.3.3 The planar / faceted transition of Ni / Pd / W(111) system......41 Chapter 4 Summary......48 Reference......49 Appendix......51 | |
dc.language.iso | en | |
dc.title | 鎳、鈷薄膜在鈀�鎢(111)表面之吸附與縐化現象 | zh_TW |
dc.title | Adsorption and faceting phenomenon of Ni, Co thin films on Pd / W(111) surface | en |
dc.type | Thesis | |
dc.date.schoolyear | 98-2 | |
dc.description.degree | 碩士 | |
dc.contributor.coadvisor | 宋克嘉(Ker-Jar Song) | |
dc.contributor.oralexamcommittee | 黃英碩(Ing-Shouh Hwang) | |
dc.subject.keyword | 表面科學,縐化現象,程控熱脫附,低能量電子繞射,歐傑電子能譜, | zh_TW |
dc.subject.keyword | surface science,faceting phenomenon,TPD,LEED,AES, | en |
dc.relation.page | 56 | |
dc.rights.note | 同意授權(全球公開) | |
dc.date.accepted | 2010-07-29 | |
dc.contributor.author-college | 理學院 | zh_TW |
dc.contributor.author-dept | 物理研究所 | zh_TW |
顯示於系所單位: | 物理學系 |
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