Response of glass and liquid phases in the vortex lattice to an external AC magnetic field at different frequencies
✍ Scribed by Massimiliano Polichetti; Maria Giuseppina Adesso; Sandro Pace
- Publisher
- Elsevier Science
- Year
- 2004
- Tongue
- English
- Weight
- 554 KB
- Volume
- 339
- Category
- Article
- ISSN
- 0378-4371
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✦ Synopsis
We individuated a method to distinguish a glass phase from a highly viscous liquid phase in a lattice of vortices, established in type-two superconductors. Our analysis is based on the study of the temperature dependence of numerically obtained 1st and 3rd harmonics curves of the AC magnetic susceptibility, by changing the frequency of the applied AC magnetic ÿeld. The harmonics are obtained by integrating the non-linear di usion equation for the magnetic ÿeld, with di erent voltage-current characteristics, corresponding to the two di erent phases. This method could be applied to the analysis of experimental curves in order to determine if the detected magnetic response of superconducting samples may be interpreted in terms of vortex glass or Kim-Anderson model.