As is well known, the relatively low critical current density J_c and the serious flux motion limit a variety of applications of high-temperature superconductors (HTSCs). The introduction
supported by the Chinese National Center for R & D on Superconductivity.
The high-TC oxide superconductors are of high ainsotropy due to their layeredcrystalline structure.For example,the anisotropic factor of YBa2Cu3O7-δ(YBCO)is about20,while...
Since the discovery of high-Tc superconductors, additions of proper elements to YBa2Cu3O7-δ system have been proved to be quite effective in both mechanism researches and i...
Project supported by the National Center for Research and Development on Superconductivity.
Since the discovery of high-temperature superconductor YBa2Cu3O7(YBCO) people aremuch concerned about its microwave surface resistance. It was found that although themicrowave surfac...
One of the most promising near-term applications of high T_c superconductingfilms is in the area of passive microwave devices. The most remarkable feature ofthese microwave devices is that the high-frequency surface r...
Project supported by the High Technology Foundation of China
Since the discovery of high temperature oxide superconductors in 1986, it is possible to adapt superconducting materials for technological applications at liquid nitrogen. One of the important applications is the fabr...
Project supported by the National Center for R & D on Superconductivity of China and by the Third World Academy of Science under contract of Research Grant No. Mp90-036
Ⅰ. INTRODUCTION HTSC films are very important to the fundamental research and application of high T_c superconductors. The critical current density J_c is the key parameter for its application. However, the mechanism...
Project supported by the National Natural Science Foundation;National Center for Research and Development on Superconductivity of China
Ⅰ. EXPERIMENTS AND RESULTS All the samples were Fabricated by the MTG method which has been described elsewhere. However, some modifications on MTG were made, i. e. the precursor material ofsample 1~# was cooled more...
Project supported by the Open Laboratory of High Performance Ceramics and Superfine Microstructure Studies.
Ⅰ. INTRODUCTION The discovery of high temperature superconductivity in perovskite-related oxides by Bednorz and Mulet has acted as a priming to widespread the research, both fundamental and applied, in the field of h...