Supported by the National Natural Science Foundation of China (Grant Nos.50472063 and 50377040) ;the State Key Development Program for Basic Re-search Program of China (Grant No. 2006CB601004)
Nano-SiC doped MgB2 tapes were prepared by the in situ powder-in-tube method. Heat treatment was performed at 650℃ for 1 h. XRD data indicate that SiC particles had reacted with the MgB2 during sintering process. MgB...
This work was supported by the Ministry of Science and Technology of China(Grant No.NKBRSG-G 1999064602);the National Natural Science Foundation of China(Grant Nos.10174003 and 50377040).
The amplitude-dependent ac susceptibility of high-temperature superconductors is shown to obey some empirical scaling relations. We try to analyze this behavior by extending a dc nonlinear response function of mixed s...