Solid State Physics

Applied Superconductivity: Handbook on Devices and by Paul Seidel

By Paul Seidel

This wide-ranging presentation of utilized superconductivity, from basics and fabrics correct as much as the main points of many purposes, is a vital reference for physicists and engineers in educational study in addition to in undefined.

Readers trying to find a entire evaluate on easy results regarding superconductivity and superconducting fabrics will extend their wisdom and knowing of either high and low Tc superconductors with recognize to their software. expertise, instruction and characterization are lined for bulk, unmarried crystals, thins fi lms in addition to digital units, wires and tapes.

The major good thing about this paintings lies in its wide assurance of vital functions in magnets, energy engineering, electronics, sensors and quantum metrology. The reader will locate details on superconducting magnets for various functions like particle physics, fusion examine, medication, and biomagnetism in addition to fabrics processing. SQUIDs and their utilization in medication or geophysics are
thoroughly coated, as are superconducting radiation and particle detectors, features on superconductor electronic electronics, top readers to quantum computing and new devices.

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Additional resources for Applied Superconductivity: Handbook on Devices and Applications

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2) Superconducting materials will be introduced, but besides some overview in the fundamentals, there will be detailed contributions only on materials relevant for applications now and in near future. 3) Technology, preparation, and characterization concerning bulk materials, single crystals, thin films, Josephson junctions, wires and tapes, as well as cooling technology will be discussed with respect to the parameters and conditions needed for applications. 4) The main part consists of eight extended chapters on different application fields, including engineering aspects as well as main important parameters and interesting details up to examples for real applications.

For larger fields, superconductivity breaks down, and the sample assumes the normal-conducting state. Bc depends on the temperature and reaches zero at T c . Pure mercury or lead are examples of a type-I superconductor. 4 “Levitated magnet” for demonstrating the Meissner–Ochsenfeld effect in the presence of an applied magnetic field. (a) Starting position at T > T c and (b) equilibrium position at T < T c . 7 8 1 Fundamentals “lower critical magnetic field” Bc1 . Superconductivity completely vanishes for magnetic fields larger than the “upper critical magnetic field” Bc2 , which often is much larger than Bc1 .

6 Image of the vortex lattice obtained with an electron microscope follow- 60 mm long, 4 mm diameter; magnetic field ing the decoration with iron colloid. Frozena parallel to the axis. Magnification: 8300× (Reproduced by courtesy of Dr. ) in flux after the magnetic field has been reduced to zero. 6, we show a lead–indium alloy as an example. These images of the magnetic flux structure were obtained as follows: above the superconducting sample iron atoms are evaporated from a hot wire. During their diffusion through the helium gas in the cryostat, the iron atoms coagulate forming iron colloids.

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