| 研究生: |
曾浩鈞 Tseng, Hao-Chun |
|---|---|
| 論文名稱: |
氧化銦摻雜鈷之磁、電性質研究 Study of Co:In2O3 on transport and magnetic properties |
| 指導教授: |
黃榮俊
Huang, Jung-Chun |
| 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: | 2008 |
| 畢業學年度: | 96 |
| 語文別: | 中文 |
| 論文頁數: | 97 |
| 中文關鍵詞: | 氧化銦 |
| 外文關鍵詞: | in2o3 |
| 相關次數: | 點閱:42 下載:3 |
| 分享至: |
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本論文研究工作主要是藉由實驗設計釐清Co:In2O3的磁、電性質來源機制。
首先,利用分子束磊晶在不同溫度下成長Co:In2O3多層膜並對樣品作XRD、XAS、Hall Effect與SQUID量測分析。在電性方面,氧空缺是主要的載子來源,且溫度會對樣品造成結構上的變化,而結構會使電性有明顯改變;磁性方面,我們認為束縛極化子模型是Co:In2O3的磁性來源機制。
接著,我們將室溫成長的樣品作真空與通氧退火三小時並與以量測分析,結構方面,樣品經退火後結構皆有改善;電性方面,真空退火使電性獲得改善,但通氧退火後樣品則呈絕緣性;磁性方面,退火容易使鈷團簇析出,故樣品呈現明顯的順磁相。
In this thesis, we tried to realize the transport and magnetic mechanism of Co:In2O3.
For starter, we grew Co:In2O3 multilayers at different temperature by MBE system and measured these samples by XRD、XAS、Hall Effect、SQUID. In electric, oxygen vacancy is the main source of carrier concentration and that temperature affected structure to influence electric property. In magnetic, we consider that the BMP model could be the magnetic mechanism.
And then, we annealed samples grown at room temperature in vacuum and oxygen for three hours. In structure, annealing improve structural quality for all samples. In electric, annealing in vacuum could improve electric property. But sample annealed in oxygen could be insulating. In magnetic, annealing made Co cluster precipitate and sample could be paramagnetic
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