Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/16994
標題: 陶瓷氧化物MoSr2YCu2O8-δ尺度效應對超導和磁性的影響
Size Effect on Superconductivity and Magnetism of MoSr2YCu2O8-δ
作者: Li, Hung-Hsien
李宏顯
關鍵字: MoSr2YCu2O8-δ
陶瓷氧化物
Size Effect
nanoparticle
Superconductivity
Magnetism
尺度效應
奈米微粒
磁性與超導
出版社: 物理學系所
引用: [1] This transcript of the classic talk that Richard Feynman gave on December 29th 1959 at theannual meeting of the American Physical Society at the California Institute of Technology(Caltech) was first published in the February 1960 issue of Caltech''s Engineering and Science [2] 曹茂盛,關長斌,徐甲強。奈米材料導論 2002 年9 月 [3] 張力得,牟季美。奈米材料與奈米結構 2001 年 [4] 張裕恆,李玉芝。超導物理 1992年 [5] Kittel ,Introduction to Solid State Physics (1998) [6] S. R. Julian ,M. R. Norman Nature .447 ,537(2007) [7]CharlesP.Poole,Jr.HoracioA.FarachRichardJ.Creswick “Superconductivity” [8] Shoenberg ,Proc . Roy.Soc . London ,A175(1940) ,49 [9]R.L.Harlow ,G.H.Kwei ,R.Suryanarayanan ,M.A.Subramanian Physica C 257, (1996) ,125 [10] B. Dabrowski ,K. Rogacki , J.W. Koenitzer ,K.R. Poeppelmeier , J.D. Jorgensen Physica C 24-35 (1997) 277 [11] K.Rogacki ,B.Dabrowski,O. Chmaissem,J.D.Jorgensen Phys. Rev. B 63,(2000) 054501 [12] S. I. Ikeda, N. Shirakawa Physica C 341-348 (2000) 785 [13]Paul N. Barnes, P. Terry Murray, Tim Haugan, Richard Rogow ,Glen P. Perram Physica C 377,(2002) 578 [14]Happy1, R.S. Rawat2, R.V. Ramanujan1, P. Lee1, A. Patran1, T.L. Tan1,S.V. Springham1 and S. Lee Plasma Phys. Vol.28G(2004) [15]Y.Y. Chena, S.-J. Jangb, C.R. Wangc, H.D. Yangd,Physica B 359–361 (2005) 497–499 [16]L.A. Dı´az-Torres ,E. De la Rosa a,P. Salas ,C. Angeles-Chavez ,L.B. Arenas ,J. Nieto Optical Materials 27 (2005) 1217–1220 [17]Y.Sudaa, T.Ono, M.Akazawa , Y.Sakai , J.T sujino, N.Homma Thin Solid Films 415 (2002) 15–20 [18] I. Felner, E. Galstyan Phys. Rev. B 68, (2003) 064507 [19] I. Felner, E. Galstyan Phys. Rev. B 69, (2004) 024512 [20] Ken-ichi Kumagai, Satomi Takada, and Yuji Furukawa Phys.Rev.B, 63, 180509 [21]R.L.Meng,B.Lorenz,Y.S.Wang,J.Cmaidalka, Y.Y.Xue,C.W.Chu Physica C 353 (2001) 195-199 [22]K.Rogack,B.Dabrowski,Chmaissem,and J.D.Jorgensen, Phys.Rev.B 63,054501(2001) [23]Y.Y.Xue,B.Lorenz,R.L.Meng,B,A.Baikalov,and,C.W.Chu Physica C 364-365,251(2001) [24]金屬超導體Y1-XSmXNi2B2C及Y1-XSmXPd5B3C0.4物理性質之研究碩士論文 鄭人瑞 [25]儀器總覽 行政院國家科學委員會精密儀器中心 [26]高溫超導 解思深著 [27]超導體簡介 中山文庫
摘要: In our research the material of MoSr2YCu2O8-δ has been discovered coexistence of antiferromagnetism and superconductivity. We got the TC =28K and TN=12K. In order to know Size Effect on Superconductivity and Magnetism of MoSr2YCu2O8-δ . We successfully synthesis 20~80nm and 3~5nm nanoparticles by pulsed laser deposition (PLD) in inert gas atmosphere. MoSr2YCu2O8-δ nanoparticles were deposited by pulsed laser deposition in 3 torr nitrogen atmospheres at a distance of 3 cm from the MoSr2YCu2O8-δ target using 266 nm Nd:YAG laser.The phase of the nanoparticles were identified the same as the parent bulk by X-ray diffraction and Energy Dispersive Spectrometer measurement. Particles sizes are determined by high-resolution transmission electron microscopic (HRTEM) analysis. The result is consistent with direct observation by TEM, FESEM and AFM. In comparison with the change in the weight of nanoparticles and bulks were measured by Thermo Gravimetric Analysis, we determined it is the influence of surface effect. The physical properties of nanoparticles were studied over wide temperature and magnetic field range in order to further understand the coexistence of magnetism and superconductivity.
陶瓷類氧化物超導與長程磁有序的並存現象,一直都是學術研究的焦點。材料本身形成超導與磁性的行為模式,以及兩者之間並存的物理機制,也都是我們亟欲了解的部分。我們以固態反應法製成高品質的樣品MoSr2YCu2O8-δ,實驗結果得到它的超導臨界溫度(TC=28K)以及磁性轉變溫度(TN=12K),在低溫環境下證明有超導與反鐵磁性共存的現象。為了瞭解尺寸效應對超導和磁性的影響,進一步利用脈衝雷射技術(Pulsed Laser Deposition)將樣品製成奈米顆粒,控制不同的製程條件,我們得到奈米微粒的粒徑主要分布在3~5 nm以及20~80 nm。實驗結果顯示,當樣品尺寸進入奈米級時,樣品本身反鐵磁訊號會消失,但卻仍有微弱超導訊號存在,這個結果我們嘗試透過粒徑與物理特徵尺寸的關係,如超導相干長度ξ (superconducting coherent length),透射深度λL (penetration depth)等,幫助我們更了解超導與長程磁序形成的物理機制有什麼不同,以及小尺寸效應導致異於塊材的物理性質。
URI: http://hdl.handle.net/11455/16994
其他識別: U0005-0208200709524900
文章連結: http://www.airitilibrary.com/Publication/alDetailedMesh1?DocID=U0005-0208200709524900
Appears in Collections:物理學系所

文件中的檔案:

取得全文請前往華藝線上圖書館



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.