基于低温光声光谱技术的高Tc超导材料Bi2Sr2CaCu2O8

在光声光谱技术基础上,将不同仪器组装成一套系统,并成功测量出碳黑的光声光谱。利用低温检测系统测定高温超导材料Bi2Sr2CaCu2O8在室温和液氮温度下的光声光谱,发现室温时在598nm和695nm有峰值,液氮温度时在466nm出现峰值。以吸收系数近似为1的碳黑为参照,利用归一化方法得到了Bi2Sr2CaCu2O8相对吸收系数谱图,并进行了初步的探讨,得到了该超导材料的一些信息,为利用低温光声光谱技术,研究超导材料的超导特性提供了一种可行的途径。

Research on High Tc Superconducting Materials Bi2Sr2CaCu2O8 by Low-Temperature Photoacoustic Spectrometry

Based on photoacoustic spectrometry,the different instruments were assembled into a system,and photoacoustic spectra of carbon black was successfully measured.The photoacoustic spectrometry of high-temperature superconducting materials Bi2Sr2CaCu2O8 at room temperature and liquid nitrogen temperature were determined by low-temperature detection system,with the peaks found in the 598nm and 695nm at room temperature and the peak appearing in the 466nm at liquid nitrogen temperature.The absorption coefficient of the carbon black closing to 1 as a reference,the relative absorption coefficient spectra of Bi2Sr2CaCu2O8 was obtained by normalization,and some information of the superconducting material was got after preliminary discussion.The method provides a feasible way for study on the superconducting properties of superconducting materials by low-temperature photoacoustic spectrometry.