MBa_2Cu_3O_(7-δ)(M=Y,Sm,Gd,Eu)超导体的红外光谱  

INFRARED SPECTRA OF SUPERCONDUCTOR MBa_2Cu_3O_(7-δ)(M=Y, Sm, Gd, Eu)

作　　者：叶红娟[1] 俞志毅[1] 陆卫[1] 陈建湘[1] 沈学础[1] 曹宁[2] 郑家琪[2] 陈熙琛[2] 

机构地区：[1]中国科学院上海技术物理研究所红外物理开放研究实验室,上海200083 [2]中国科学院物理研究所,北京100080

出　　处：《红外研究》1990年第3期189-197,共9页

基　　金：国家自然科学基金

摘　　要：测定了多晶超导体MBa_2Cu_3O_(7-δ)(M=Y,Sm,Gd,Eu)的反射光谱和透射光谱。在远红外(40～360cm^(-1))反射谱中观察到5个特征反射峰和3个反转结构,在中红外反射谱中有一580cm^(-1)峰,在中红外吸收谱中有580～590cm^(-1)和615～627cm^(-1)两个峰。本文分析了这些峰对应的振动模,并由反转结构确定了超导能隙和比值γ=2Δ/k_BT_c。The reflection and transmission spectra of the polycrystalline superconductors MBa_2Cu_3O_(7-δ)(M=Y, Sm, Gd, Eu) are reported. Five characteristic reflection peaks and three inversion structures have been observed in the far-infrared (40～360cm^(-1)) reflection spectra common to all these materials. In the mid-infrared region, there is another characteristic reflection peak of 580cm^(-1). In the absorption spectra two peaks have been found at 580～590 and 615～627cm^(-1). Vibration modes corresponding to these peaks are analyzed and the ratio γ=2⊿/k_BT_c is determined from the inversion structure.

关 键 词：氧化物 超导体 红外反射光谱 反射峰 

分 类 号：TM262[一般工业技术—材料科学与工程]