摘要
Ⅰ. INTRODUCTIONSoon after J. G. Bednorz and K. A. Müller discovered the high T_C superconductor, they reported a zero magnetic field microwave absorption in Ba-La-Cu-O. Thereafter, this phenomenon has been observed by ESR spectrometer in almost all kinds of high T_C
基金
Project supported by the National Center for Research and Development on Superconductivity.