Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8161722 | Physica B: Condensed Matter | 2016 | 6 Pages |
Abstract
Thermally activated flux flow (TAFF) regime of Er doped Bi2Sr2Ca1âxErxCu2O8+δ (x=0.0, 0.1, 0.3) polycrystalline systems have been investigated using magneto-transport measurements up to 70 kOe magnetic field. High quality single phase samples have been prepared by standard solid state reaction method. The activation energy or pinning strength (U0) have been calculated using thermally activated flux flow (TAFF) model by linear fitting from the semi-logarithmic curve of lnÂ Ï vs 1/T. It has been observed that activation energy (U0) decreases with Er substitution and U0 follows power law dependence with magnetic field for all three samples. Irreversibility lines (IL) have been drawn from the magneto-transport data for all three samples and it is observed that IL shifts to lower temperature with higher Er concentration. It is confirmed from the above results that pinning strength becomes weaker with Er doping. Finally, the variation of U0 have been shown with temperature by re-plotting -T(ln (Ï/Ï100)) vs T for three samples showing non-linear dependence with temperature.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
D. Paladhi, P. Mandal, R.C. Sahoo, S.K. Giri, T.K. Nath,