| DC 欄位 |
值 |
語言 |
| DC.contributor | 物理學系 | zh_TW |
| DC.creator | 陳樹希 | zh_TW |
| DC.creator | Shu-Shi Chen | en_US |
| dc.date.accessioned | 2016-7-5T07:39:07Z | |
| dc.date.available | 2016-7-5T07:39:07Z | |
| dc.date.issued | 2016 | |
| dc.identifier.uri | http://ir.lib.ncu.edu.tw:88/thesis/view_etd.asp?URN=103222007 | |
| 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 | 本篇論文討論的鐵基超導材料LaOFeAs1-xPx ( x =0.4，0.44，0.48)，是以不同比例的磷原子摻雜於無超導性的材料LaOFeAs中而構成。我們研究其晶體結構，磁性行為，磁有序參數，磁結構以及超導的研究。以固態反應法製備樣品，並以中子繞射儀判定其結構。
隨磷摻雜比例的提升，磁化強度也會變大，而x = 0.48相較其它的樣品有着較大的磁化強度，x = 0.4則相較其它的樣品有着較小的磁化強度約為10-5 emu/g。從磁化曲線能夠初步判斷x =0.4，0.44，0.48皆有着鐵磁的磁有序特性，接著再以中子繞射譜圖，擬合磁結構模型，確定樣品的磁性及磁矩方向。最後由磁化曲線得知樣品的超導溫度。 | zh_TW |
| dc.description.abstract | We study iron-base superconductor material LaOFeAs1-xPx ( x =0.4，0.44，0.48). This material is composed of different fraction phosphorus and LaOFeAs which is not superconductor material. Crystal structure is tetragonal, space group is P4/nmm and it is layer structure which composed of La2O2 and Fe2As2. Sample is made by soild reaction and magnetic behavior, neutron diffraction, orderparameter, magnetic structure are stuied.
Magnetization of x = 0.48 which is the largest value is 0.17 (emu/g) and x = 0.4 has the most small magnetization (~10-5 emu/g) . Magnetic structures for three samples are ferromagnetic arrangement, and magnetic moment direction are [111]determined by GSAS. Moment for x =0.4，0.44，0.48 are respectly 0.71(1)μB, 0.55(8) μB, 0.01μB . Superconductor temperature of x =0.44，0.48 are respectly 8 K and 10.4 K. | en_US |
| DC.subject | 超導 | zh_TW |
| DC.subject | 磁有序 | zh_TW |
| DC.title | 磷摻雜對鐵基超導LaOFeAs1-xPx 磁有序及超導特性的影響 | zh_TW |
| dc.language.iso | zh-TW | zh-TW |
| DC.type | 博碩士論文 | zh_TW |
| DC.type | thesis | en_US |
| DC.publisher | National Central University | en_US |