Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/17309
標題: Y3Ba5(Cu1-xFex)8O18-δ拉曼光譜的研究
Raman spectra of Y3Ba5(Cu1-xFex)8O18-δ
作者: 詹益誌
Chan, Yi-Chih
關鍵字: 拉曼 超導;RAMAN superconductivity
出版社: 奈米科學研究所
引用: [1]超導體簡介/呂華台、吳景淼、洪姮娥 等編著/中山文庫 [2]UgurTopal. Mustafa Akdogan J Supercond Nov Magn (2011) [3]P. Udomsamuthirun. T. Kruaehong .J Supercond. Nov Magn (2010) [4]A. Tavana and M. Akhavan , Eur. Phy. J . B,79-83 (2010) [5]A. Aliabadi , Y. AkhavanFarshchi and M. Akhavan ,Physica C 469 2012-2014 (2009) [6]M. Hangyo, S. Nakashima Solid State Communications, Vol.65,No.8(1988) [7] Introducyion to Solid State Physics 8/e. Kittel 著,洪連輝等人 譯 [8] Rishi Kumar Singhal. Journal of Alloys and Compounds 495 (2010) [9] H.Chang , Y.T.Ren, Y.Physica C 252 (1995) [10]R.J.Hemley and H.K.Mao, Phys. Rev. Lett. 58, 2340 (1987) [11]C.Thomsen, M.Cardona, Solid State Cormnunications, Vol.65,No.10,(1988) [12]RenzhongXue, ZhenpingChen ,Physica C 475 (2012) [13]Nawazish A. Khan , H. Ihara Physica C 403 (2004) [14]X.H.Chen, M.Yu, G.G.Qian, and Z.S.Liu, Phys. Rev. B. Vol. 57, No 9.(1998) [15]C.Thomsen, R.Liu, Solid State CommunicaCions, Vol.65,No.1, (1988) [16]M.Hangyo, S.Nakashima, Solid State Communications, Vol.67,No.12,(1988) [17]E.Altendorf, Solid State Communications, Vol.76, No.3, (1990) [18]Duong Cong Hiep, Journal of Raman Spectroscopy 32 (2001) [19] Frances E. Solid State Communications, Vol.64,No.12, (1987)
摘要: 
本文探討鐵離子摻雜後Y3Ba5(Cu1-xFex)8O18-δ的結構性質與拉曼頻譜。以固態反應法製作出的多晶樣品,摻雜鐵的比例分別為x=0、0.03、0.05、0.08與0.10。利用X-ray粉末繞射儀,先行觀察樣品在不同摻雜比例下的晶體結構變化,並計算晶格常數與理論密度。以電性量測獲得不同摻雜比例的Y3Ba5(Cu1-xFex)8O18-δ,其超導電性TC隨著摻雜比例的增加而逐漸減小;正常態下的材料性質,也從電阻隨溫度升高而增加的金屬性質,逐漸轉變為類半導體,顯示樣品的傳導載子發生變化。拉曼光譜顯示樣品在110、140、220、335、470與571(cm-1)有峰值出現。其中在470 cm-1的峰值,隨著含鐵量的不同,有最為明顯的拉曼位移,其變化趨勢與晶格c軸長度有相干關係。推論拉曼頻譜中出現的峰值所代表的鍵結振動態,認為在以鐵離子對結構中的銅離子做摻雜時,並非是以隨機方式替代任何結構中 的銅,而是優先對銅氧鏈上的銅作取代,並影響負責供應載子的銅氧鏈,進而改變超導轉變發生的溫度。

This report has studied the variation of structure and Raman spectra of Y3Ba5(Cu1-xFex)8O18-δ with Fe content.The crystals are prepared by the usual solid-state reaction technique. Its structure is analysed by powder x-ray diffraction. The superconducting transition temperature Tc decreases with the increase of Fe-doping content. A semiconducting behavior appears for high Fe composition samples(x 0.08). The transport properties are strongly dependent on the Fe dopants. Six peaks of Raman shifts are located at 110、140、220、335、470 and 571(cm-1). The 470 cm-1 mode has obviously shift with increasing Fe composition. The result might indicate that increasing Fe doping substitutes the Cu site at CuO chains.
URI: http://hdl.handle.net/11455/17309
其他識別: U0005-0402201315490800
Appears in Collections:奈米科學研究所

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