Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1815357 | Physica B: Condensed Matter | 2007 | 4 Pages |
Abstract
In this work, we report analysis of magnetization fluctuations for the CaLaBaCu3O7âδ superconducting system. We describe a procedure for extracting the penetration depth λ(T) and the coherence length ξ parameters from the magnetization, as a function of the applied magnetic field. This procedure takes the vortex fluctuation into account. The data of the magnetization excess ÎM(T) are analyzed for different values of temperature in the interval from 65 to 73 K. For several magnetic fields we observed a crossover in the magnetization curves at the characteristic temperature value T*=72.2 K. We calculated the data of magnetization excess from the curves of magnetization as a function of the logarithm of the applied field. This procedure was performed for polycrystalline samples of CaLaBaCu3O7âδ by using the proposition of Bulaevskii, Ledvij and Kogan. We notice that the values for these superconducting parameters are in agreement with reports for high-temperature superconductors.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
C.A. Parra Vargas, D.A. LandÃnez Téllez, J. Roa-Rojas,