Superconductor pellet

Superconductor pellet made from Y203-BaC03-Cu0, special magnet (Co-Sm), liquid nitrogen. 

A superconductor. A pellet of superconducting material, previously cooled to 77 K with liquid nitrogen, floats above a magnet. 

In one set, composites of (Y-123) and (Bl-2212) were synthesized by grinding the Individual superconductors together In the correct ratios In an agate mortar, pressing them Into pellets at 20,000 psl and firing. The starting superconductors (W. R. Grace and Co.,... 

Winkler and Mayer (420) have attempted to prepare derivatives of the type IrL(CO)2(Cl) which contain highly polarizable ligands, L — 9,10, and 11, in an attempt to experimentally realize Little s excitonic superconductor (268, 269, 429). These materials, [IrL(CO)2Cl] (L = 9-11), were shown via two-probe measurements on pressed pellets to have conductivities in the range of insulators, metal-metal interaction in the solid state because the ligands used were are bulky and hinder close approach. In addition, the single crystal conductivities of Ir(CO)2(PrNH2)X (X = Cl, Br, I) have been measured as 0.2-10 x 10 cm i(24,313,314), while Ir(CO)2-Cl(p-toluidine) has a conductivity of 10 Q cm (313, 314). 

Superconductors at or below 7.- exhibit the Meissner effect, the exclusion of magnetic fields. In Figure 25.18. for example, a magnet is shown levitating above aYBCO pellet, a superconductor at or below — 180°C, its T. ... 

While the growth of conductive polymer layers onto bulk high-Tc ceramic pellets can be accomplished readily, the use of thin films of YBa2Cu307- s is preferred for the construction of polymer/superconductor bilayer structures. Consequently, thin films of YBa2Cu707 is (—200-5(X)0 A in thickness) were deposited onto singlecrystal MgO(KX)) substrates using the pulsed laser ablation method [291, and these films were used to create polymer/superconductor bilayer structures. The result-... 

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