Weak field magnetic susceptibility fluctuations of Y3Ba5Cu8-xFexO18 (0.0597 ≤ x≤ 0.1255) superconductor above the superconducting transition

International Conference and Exhibition on Mesoscopic & Condensed Matter Physics

June 22-24, 2015 Boston, USA

Iv�?¡n Supelano Garc�?­a

Technological University of Colombia, Colombia

Posters-Accepted Abstracts: J Material Sci Eng

Abstract :

In the so-called weak magnetic field limit, the excess of magnetization is associated with the fluctuations of the vortex lines positions. In this work, we present a study of magnetic susceptibility fluctuations in the limit of weak magnetic fields for Y3Ba4Cu8-xFexO18 (0.0597 â�?¤xâ�?¤0.1255) high temperature superconductor system. Samples were synthesized by the standard solid-state reaction. For the fluctuation analysis, we use the concept of excess of magnetization, based on the Lawrence-Doniach model which allowed calculating the diamagnetism induced by thermal fluctuations in the normal state in the vicinities of critical temperature Tc0. The best adjustment in the experimental data, in the limit of weak magnetic field, of �?�?Ï�?/Tin function of the reduced temperature allowed to obtain the values of critical parameters: BLD (LD parameter), AS (diamagnetism of Schmidt), �?¾ab(0) (correlation length in ab plane) and �?¾c(0) (correlation length in c direction) in each one of the samples for 2D fluctuation regime.

Biography :

Email: ivan.supelano@uptc.edu.co