| 研究生: |
王旻永 Min-Yung Wang |
|---|---|
| 論文名稱: |
普魯士藍Rb-Co-Fe@K-Ni-Cr 奈米核殼結構的磁性探討 |
| 指導教授: | 李文献 |
| 口試委員: | |
| 學位類別: |
碩士 Master |
| 系所名稱: |
理學院 - 物理學系 Department of Physics |
| 論文出版年: | 2015 |
| 畢業學年度: | 103 |
| 語文別: | 中文 |
| 論文頁數: | 108 |
| 中文關鍵詞: | 普魯士藍 、光敏磁性材料 |
| 外文關鍵詞: | Prussian Blue Analogue, Photosensitive material |
| 相關次數: | 點閱:14 下載:0 |
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本論文討論Rb-Co-Fe相、K-Ni-Cr相、與核殼結構的類普魯士藍(PBA)的磁性現象,Rb-Co-Fe相兩個樣品分別在7與8 K觀察到磁的相轉變,而K-Ni-Cr相有兩個磁的相轉變分別在72與68 K時產生。 核殼結構Rb-Co-Fe@ K-Ni-Cr則有三個磁相變變化分別72、68與5 K ,而核Rb-Co-Fe相的磁矩是比較弱的,而且磁矩方向是與殼K-Ni-Cr相是相反的。
核殼結構Rb-Co-Fe@ K-Ni-Cr奈米粒子進行了中子實驗,中子散射結果顯示核殼結構Rb-Co-Fe@ K-Ni-Cr奈米粒子具有鐵磁性,Rb-Co-Fe相是光敏材料,而照光後發現K-Ni-Cr相與Rb-Co-Fe相磁性增加,我們認為Rb-Co-Fe相跟K-N-Cr相做成核殼結構的奈米粒子讓K-N-Cr相也變成光敏材料。
In this thesis, we will discuss magnetic phenomena of Prussian Blue Analogue with Rb-Co-Fe phase, K-Ni-Cr phase and core/shell PBA heterostructure. Rb-Co-Fe phase in the two samples were 7 and 8 K magnetic phase transition was observed. Two separated magnetic phase transition at 72 and 68 K are found in K-Ni-Cr phase. Three separated magnetic phase transition at 72、68 and 5 K are found in core/shell Rb-Co-Fe@ K-Ni-Cr heterostructure. The development of weak magnetic moments in the core(Rb-Co-Fe phase). Apparently, the moments in the core and on the shell (K-Ni-Cr phase) point in the opposite directions.
The observation of ferromagnetic of the Rb-Co-Fe@ K-Ni-Cr nanoparticle are studied through the ac magnetic susceptibility and neutron diffraction measurements, Although the CoFe material is a well established photomagnet, the magnetic of Rb-Co-Fe phase and KN-Cr phase are both increased, we believe that Rb-Co-Fe phase with KN-Cr phase formed core-shell structure nanoparticles make K-Ni-Cr phase has become photosensitive material.
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第四章
[1]. Matthieu F. Dumont, Elisabeth S. Knowles, Amandine Guiet, Daniel M. Pajerowski, Ariel Gomez,Stefan W. Kycia, Mark W. Meisel, and Daniel R. Talham, Inorg. Chem. 50, 4295–4300,(2011)
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第五章
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