Magnetic Field Distributions of High-Tc Superconductors : miSR Study on Internal Magnetic Field Distributions of a Type II High-Tc Superconductor with Non-conducting Inclusions

ISBN-13: 9783659904493 / Angielski / Miękka / 2016 / 116 str.

Yuxin Dai

Opis

The internal magnetic field distributions for a type II superconductor (a single crystal Y Ba2Cu3O7-d) with large normal non-conducting inclusions (Y2BaCuO5) are studied. A model based on the London Equations has been successfully developed and applied to the interpretation of the miSR data on this system. The temperature dependence of the magnetic field distributions in the inclusions as compared to the model prediction for an inclusion size which matches the data allows the estimation of the magnetic field penetration depth. This presents a novel method of obtaining the temperature dependence of the penetration depth. In the model introduced here the inclusions have been assumed to be cylindrical and infinite in length. Therefore, this model should be especially appropriate for the prediction of magnetic field distributions in single crystal superconductors in which columnar defects have been purposely introduced to enhance pinning.

O autorze

Yuxin (Eugene) Dai received a Ph.D degree in Physics from the College of William & Mary at Williamsburg, VA, USA. He has an educational background in particle physics and solid-state physics. He also has research experience in studying magnetic properties of high Tc superconductors, as well as R&D in optical communications.