Materials Science and Engineering: An Introduction

Published by Wiley
ISBN 10: 1118324579
ISBN 13: 978-1-11832-457-8

Chapter 20 - Magnetic Properties - Questions and Problems - Page 837: 20.30

Answer

The difference is as follows: For type I superconductors, with increasing magnetic field the material is completely diamagnetic and superconductive below HC, while at HC conduction becomes normal and the complete magnetic flux penetration takes place. On the other hand, for type II superconductors, upon increasing the magnitude of the magnetic field, the transition from the superconducting to normal conducting states is gradual between lower-critical and upper-critical fields. Magnetic flux penetration is also gradual during the transition. Also, Type II generally have higher critical temperatures and critical magnetic fields.

Work Step by Step

The difference is as follows: For type I superconductors, with increasing magnetic field the material is completely diamagnetic and superconductive below HC, while at HC conduction becomes normal and the complete magnetic flux penetration takes place. On the other hand, for type II superconductors, upon increasing the magnitude of the magnetic field, the transition from the superconducting to normal conducting states is gradual between lower-critical and upper-critical fields. Magnetic flux penetration is also gradual during the transition. Also, Type II generally have higher critical temperatures and critical magnetic fields.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.