The future for HTSs

Understanding of vortex pinning mechanisms will steadily develop and with it the technology of optimising compositions and structures of materials for trapped field magnets, particularly the melt-textured, large grain varieties. 

The introduction of high-Tj. superconductor technology into the mobile communications arena will continue. 

A thin-film nichrome resistor in the form of a rectangle of dimensions 1 mmx5mm is deposited on to a glass substrate. Estimate the thickness of the film for the resistance measured between electrodes contacting the 1 mm edges to be 1.0 kfl The resistivity of nichrome may be taken to be 1.07 x 10 6Qm. 

Calculate the surface resistivity of the nichrome film. [Answers 5.35 nm 200 D/n] 

An electroded disc of thickness 1 mm is connected to a 2 V supply. Using the idealized model given in Fig. 4.9(b) estimate the electric field across the IGL given that tr — I nm and dg = 20 /im. Assume the resistance of the IGLs to be dominant. [Answer 107 V m 1J 

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