Raman spectra of Y3Ba5(Cu1-xFex)8O18-δ

• Main Authors: Yi-Chih Chan, 詹益誌
• Other Authors: 藍明德
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/fx2uwm

碩士 === 國立中興大學 === 奈米科學研究所 === 101 === 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.