The aim of this book is to acquaint the reader with the phenomenon of superconductivity
and the high temperature superconductors discovered in 1986
by Bednorz and Muller. Just after this discovery, a lot of research work was
carried out by the scientists worldwide over for more than about 10 years.
This book describes the superconductivity phenomenon (Chap. 1), the
structure of high Tc superconductors (Chap. 2), the critical currents (Chap. 3),
synthesis of high Tc superconductors (Chap. 3), the superconductivity in
cuprates (Chap. 4), proximity effect and SQUID devices, their design criteria
and noise aspects (Chap. 6), theories (Chap. 7) and applications (Chap. 8).
The author is grateful to Professor O.N. Srivastava, Banaras Hindu University,
Varanasi for valuable guidance and discussions during Ph.D. tenure of the
author and also thankful to Prof. R.S. Tiwari, Dr. K. Ramakrishna, Dr. Balak
Das, Dr. K.K. Verma, Dr. G.D. Varma and Dr. H.K. Singh, who worked along
with the author during research at B.H.U., leading to his Ph.D. The author is
thankful to Prof. D.P. Tiwari (Head, Physics Department, A.P.S. University,
Rewa), Dr. A.P. Mishra and Dr. S.L. Agrawal, Physics Department, A.P.S.
University, for boosting the morale.
The author is thankful to scientists and researchers whose work/papers
have been consulted for preparing the manuscript. Further I wish to express
thanks to Mr. Dharmendra Saxena for preparing type-script.
Thanks are also due to Dr. Priti Nanda (Springer India), Adelheid Duhm
and Dr. Habil Claus E. Ascheron (Springer Physics, Executive Editor) for
bringing out the book in a short time. Suggestions from readers for future
improvements would be highly welcome.
Last but not the least, I wish to thank my wife Alka and sons Ankur and
Akshat for maintaining endurance during the completion of the task.

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