Microwave surface resistance of superconductors with grain boundaries
نویسندگان
چکیده
منابع مشابه
Microwave Residual Surface Resistance of Superconductors”
Two distinct models account for the microwave residual surface resistance of superconducting cavities with equally good agreement with the measured temperature and frequency dependence. In presenting his phonon generation model, Passow claimed that Rabinowitz’s fluxoid power loss model of residual resistance does not fit the experimental data, whereas his does. In fact, the two models have esse...
متن کاملAdvantageous grain boundaries in iron pnictide superconductors
High critical temperature superconductors have zero power consumption and could be used to produce ideal electric power lines. The principal obstacle in fabricating superconducting wires and tapes is grain boundaries-the misalignment of crystalline orientations at grain boundaries, which is unavoidable for polycrystals, largely deteriorates critical current density. Here we report that high cri...
متن کاملThe behavior of grain boundaries in the Fe-based superconductors
The Fe-based superconductors (FBSs) are an important new class of superconducting materials. As with any new superconductor with a high transition temperature and upper critical field, there is a need to establish what their applications potential might be. Applications require high critical current densities, so the usefulness of any new superconductor is determined both by the capability to d...
متن کاملCurrent transport along grain boundaries in d-wave superconductors
The use of a classic phase retrieval algorithm has been previously used to determine the local critical current Jc(x) along the length of grain boundary Josephson junctions that can be characterized using a standard s-wave model. The phase retrieval approach has been modified for use with d-wave dominated superconductors to allow for negative local currents along the boundary. In general soluti...
متن کاملCritical Current of Low-Angle Grain Boundaries in High-Tc Superconductors
Dependence of the critical current on the misorientation angle in high-temperature superconductor [001] tilt bicrystal is theoretically examined. We suppose that in the case of relatively small values of the bicrystal misorientation angle θ (θ ≤ 10÷15) the critical current is determined by depinning of vortices, which are locked by edge dislocations aligned along the bicrystal grain boundary. D...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review B
سال: 2005
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.71.064507