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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 林敏聰 | |
| dc.contributor.author | Jang-Chang Huang | en |
| dc.contributor.author | 黃仁璋 | zh_TW |
| dc.date.accessioned | 2021-06-08T07:02:30Z | - |
| dc.date.copyright | 2009-02-12 | |
| dc.date.issued | 2009 | |
| dc.date.submitted | 2009-02-02 | |
| dc.identifier.citation | [1] J. R. Petta, S. K. Slater, and D. C. Ralph, Phys. Rev. Lett. 93,
136601(2004) [2] Alexandre R. Rocha, V´ıctor M. Garc´ıa-Su´arez, Steve W. Bailey, Colin J. Lambert, Jaime Ferrer, and Stefano Sanvito, Nat. Mat. 4, 335(2005) [3] R. Vollmer, Th. Gutjahr-Loser, and J. Kirschner, S. van Dijken and B. Poelsema, Phys. Rev. B, 60, 6277(1998) [4] T. C. Kreutz, E. G. Gwinn, R. Artzi, R. Naaman, H. Pizem and C. N. Sukenik, Appl. Phys. Lett. 83, 4211(2003) [5] C. Pernechele, M. Solzi, M. Ghidini, E. Arisi, I. Bergenti, and V. Dediu, J. Phys. D: Appl. Phys. 41, 134013(2008) [6] I. Bergenti, A Riminucci, E. Arisi, M. Murgia, M. Cavallini, M. Solzi, F. Casoli and V. Dediu, J. Magn. Mag. Mat. 316, e987(2007) [7] S. N. Ahmad, S. G. Rao, S. A. Shaheen, D. Magana, and G. F. Strouse, Appl. Phys. Lett. 92, 112511(2008) [8] Lei Fu, Vinayak P. Dravid, D. Lynn Johnson, Appl. Surf. Sci. 181, 173(2001) [9] Wonbae Bang and Kimin Hong, Electrochem. Solid-State Lett. 10, J86(2007) [10] Abraham Ulman, An Introduction to Ultrathin Organic Films from Langmuir-Blodgett to Self-Assembly(1991) [11] Y. Pennec, W Auw¨arter, A. Schiffrin, A. Weber Bargioni, A. Riemann, and J. V. Barth, Nat. Nano Tech. 2, 99(2007) [12] M. F. Calhoun, J. Sanchez, D. Olaya, M. E. Gershenson, and V. Podzorov, Nat. Mat. 7, 84(2008) | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/26192 | - |
| dc.description.abstract | We demonstrate the tuning of magnetic properties of ferromagnetic (FM)
thin films by reversing the functional groups of a molecular mono-underlayer. We construct a bilayer thin film system which consists of a FM material and an organic mono-layer by applying organic molecules to form a molecular mono-layer on the glass substrate, then depositing the FM thin film onto the organic molecules by sputtering. We design the experiment to use only one kind of molecule to create two different kinds of surfaces by reversing the functional groups of the molecular mono-layer. By simply reversing the functional groups of the mono-layer in direct contact with the FM thin films, two kinds of surfaces have been designed to be hydrophilic or hydrophobic. Two FM materials are studied. One is CoFe, and the other is permalloy (Py). In the system of CoFe thin films we found the coercivity of hydrophobic molecular mono-layer covered with CoFe films is enhanced. On the other hand, in the system of Py thin films we found the FM behavior disappears at room temperature when the hydrophobic molecular mono-layer is covered with Py films, and this phenomenon is correlated to the surface morphology. The study in this thesis is helpful to organic spintronics and could be used to fabricate organic spintronics, which is a frontier of spintronics. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-08T07:02:30Z (GMT). No. of bitstreams: 1 ntu-98-P95222002-1.pdf: 23063712 bytes, checksum: 88254bfa05dc4b3133ba1936afcc98a0 (MD5) Previous issue date: 2009 | en |
| dc.description.tableofcontents | 1 Introduction and Motivation 10
2 Apparatuses and Chemicals 14 2.1 Preparation and Fabrication . . . . . . . . . . . . . . . . . . . 14 2.1.1 Preparation System of Langmuir-Blodgett Films . . . . 14 2.1.2 Sputtering System . . . . . . . . . . . . . . . . . . . . 18 2.2 Analysis of Film Properties . . . . . . . . . . . . . . . . . . . 21 2.2.1 Magnetic Properties . . . . . . . . . . . . . . . . . . . 21 2.2.2 Morphology . . . . . . . . . . . . . . . . . . . . . . . . 22 2.2.3 Surface Properties . . . . . . . . . . . . . . . . . . . . 24 2.3 Chemicals and Materials . . . . . . . . . . . . . . . . . . . . . 24 2.3.1 Ferromagnetic Materials . . . . . . . . . . . . . . . . . 24 2.3.2 Amphibious Molecules . . . . . . . . . . . . . . . . . . 24 3 Experimental Processes 24 3.1 Flow chart of experiments . . . . . . . . . . . . . . . . . . . . 24 3.2 Preparation of Organic Langmuir-Blodgett Films . . . . . . . 26 3.3 Preparation of Ferromagnetic Thin Films . . . . . . . . . . . . 27 3.4 Measurement and Analysis of Samples . . . . . . . . . . . . . 27 3.4.1 Magnetic properties . . . . . . . . . . . . . . . . . . . . 27 3.4.2 Thickness . . . . . . . . . . . . . . . . . . . . . . . . . 27 3.4.3 Morphology . . . . . . . . . . . . . . . . . . . . . . . . 28 3.4.4 Surface Properties . . . . . . . . . . . . . . . . . . . . 28 4 Results and Discussion 28 4.1 Surface Properties of Stearic Acid . . . . . . . . . . . . . . . . 28 4.2 Ferromagnetic Properties of CoFe Thin Films System . . . . . 29 4.3 Ferromagnetic Properties of Permalloy Thin Films System . . 41 5 Summary 49 6 References 50 | |
| dc.language.iso | en | |
| dc.subject | 鐵磁性薄膜 | zh_TW |
| dc.subject | 單分子層官能基 | zh_TW |
| dc.subject | molecular mono-layer | en |
| dc.subject | ferromagnetic thin-film | en |
| dc.title | 單分子層官能基對鐵磁性薄膜磁性質改變之研究 | zh_TW |
| dc.title | Tuning of Magnetic Properties of Ferromagnetic Thin-film by Reversing the Functional Group of Molecular Mono-underlayer | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 97-1 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 林寬鋸,陳銘堯,戴龑 | |
| dc.subject.keyword | 單分子層官能基,鐵磁性薄膜, | zh_TW |
| dc.subject.keyword | ferromagnetic thin-film,molecular mono-layer, | en |
| dc.relation.page | 50 | |
| dc.rights.note | 未授權 | |
| dc.date.accepted | 2009-02-03 | |
| 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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