| DC 欄位 |
值 |
語言 |
| DC.contributor | 物理學系 | zh_TW |
| DC.creator | Zainollah | zh_TW |
| DC.creator | Ahmad | en_US |
| dc.date.accessioned | 2019-7-17T07:39:07Z | |
| dc.date.available | 2019-7-17T07:39:07Z | |
| dc.date.issued | 2019 | |
| dc.identifier.uri | http://ir.lib.ncu.edu.tw:444/thesis/view_etd.asp?URN=106222601 | |
| dc.contributor.department | 物理學系 | zh_TW |
| DC.description | 國立中央大學 | zh_TW |
| DC.description | National Central University | en_US |
| dc.description.abstract | 通過具有單源室的熱蒸發方法製造Sn納米顆粒。 進行X射線衍射，利用晶體結構的表徵來確定生長的Sn納米顆粒的平均粒徑（樣品1和样品2分別為56nm和152nm）。 Sn的組成是使用通用結構分析系統（GSAS）程序分析X射線衍射圖案。
在我們的研究中，通過AC磁化率（χAC=χ′+iχ′′）測量超導抗磁屏蔽效應。 磁化率χ′（T）的溫度依賴性可以用Scalapino的表達式來描述，該表達式允許提取超導轉變溫度。 樣品1和样品2的臨界溫度分別為3.8K和3.6K。
在磁化率χ′（H）曲線的場依賴性中可以看到自旋極化效應，其可以通過衍生Langevin函數來描述，樣品1和样品2都顯示出超導性和自旋極化。 | zh_TW |
| dc.description.abstract | Sn nanoparticles are fabricated by a thermal evaporated method with single source chamber. X-ray diffraction performed the characterization of the crystal structure is utilized to determine the mean particle diameter (sample 1 and sample 2 is 56 nm and 152 nm, respectively) of the Sn nanoparticle as grown. The composition of Sn is an analysis of the X-ray diffraction pattern using the General Structure Analysis System (GSAS) program.
In our study, the superconducting diamagnetic screening effect was measured through AC magnetic susceptibility (χ_AC=χ^′+iχ′′). The temperature dependence of magnetic susceptibility χ′(T) can be described by Scalapino’s expression, which allows extracting the superconducting transition temperature. The critical temperature of sample 1 and sample 2 is 3.8 K and 3.6 K, respectively.
The spin polarization effects are seen in field dependence of the magnetic susceptibility χ′(H) curve, which can be described by derivative Langevin function, both of sample 1 and sample 2 revealing of superconductivity and spin polarization.
| en_US |
| DC.subject | Sn，X射線衍射，反磁性，自旋極化 | zh_TW |
| DC.subject | Sn, X-ray diffraction, diamagnetic, spin polarization | en_US |
| DC.title | Sn納米粒子的超導電性和自旋極化 | zh_TW |
| dc.language.iso | zh-TW | zh-TW |
| DC.title | Superconductivity and Spin Polarization in Sn Nanoparticles | en_US |
| DC.type | 博碩士論文 | zh_TW |
| DC.type | thesis | en_US |
| DC.publisher | National Central University | en_US |