METHOD FOR EVALUATING SUPERCONDUCTIVITY CHARACTERISTIC OF OXIDE HIGH-TEMPERATURE SUPERCONDUCTOR

摘要

PROBLEM TO BE SOLVED: To provide a simple and low-cost superconductivity characteristic evaluating method on an oxide high-temperature superconductor for evaluating the concentration of carriers in a CuO2surface directly affecting the superconductivity characteristic and evaluating the concentration of carriers in a minute area. SOLUTION: The superconductivity characteristic of the oxide high-temperature superconductor is evaluated from Raman scattering intensity on the CuO2surface of the superconductor. When the superconductor 7 has an insulator phase, Raman excitation light 8 is well joined to phonons 11 on the CuO2surface 5 since holes 10 for scattering the excitation light 8 are few and the intensity of Raman scattering light 9 is large. When the superconductor 7 has a metallic phase, the excitation light 8 joined to the phonons 11 on the CuO2surface 5 is reduced since the holes 10 for scattering the excitation light 8 are many and the intensity of the scattering light 9 is reduced. COPYRIGHT: (C)2004,JPO&NCIPI