6. Summary

Ac and Dc Josephson device is a solid state device extremely sensitive to applied magnetic field. When two Josephson junction is coupled parallel to form Superconducting Quantum interference Device or SQUID. It can measure voltage and magnetic field to very high accuracy in the order of femto scale. Though the research in this field is considered to be advance stage, the refrigeration issue is still the major obstacle for application of low T_c superconducting device outside laboratory environment. This might be achieved with extensive computer control.

7. References

[1]. Charls Kittel, ”introduction to solid state physics”, eight edition, John weley & sons 2005.

 [2]. A thesis by John Blands, “mossbauer spectroscopy and magnetometry study of magnetic multilayer and oxides” 2003. [www.cmp.liv.ac.uk./frink/thesis/]

 [3]. H.Matsumoto, T.Koyama, M,Machida, “Electromagnetic waves in Single and Multi-Josephson Junction”. Physica C, 468 (2008), 654.

 [4].J.R.Kirtley, ”SQUID microscopy for fundamental studies”, Physica C, 368, 55-65, 2002.

 [5]. Applied Superconductivity, “Application of High temperature SQUIDs”, Vol. 3, No.7-10, pp.368, 1995.

[6]. A.Ekert, P.hayden, H.Inamori “basic concepts in quantum computation”, University of Oxford, UK, Feb 1, 2008.

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