Open AccessSecond Magnetization Peak Effect in a Fe(Se,Te) iron based superconductor
Author(s) -
Armando Galluzzi,
K. Buchkov,
V. Tomov,
E. Nazarova,
Antonio Leo,
Gaia Grimaldi,
A. Nigro,
S. Pace,
Massimiliano Polichetti
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1226/1/012012
Subject(s) - condensed matter physics , superconductivity , magnetization , hysteresis , magnetic field , magnetic hysteresis , materials science , flux pinning , critical current , iron based superconductor , physics , quantum mechanics
The iron based superconductor FeSe 0.5 Te 0.5 has been investigated by means of DC magnetic measurements as a function of magnetic field (H). By considering the superconducting m(H) hysteresis loops at different temperatures, the sample shows a strong superconducting signal together with the presence of a peak effect that causes an anomalous increase in the field dependence of the critical current density J c (H). The presence of the peak effect has been studied by means of the J c (T) obtained at different magnetic fields starting from the J c (H) curves. The analysis of the J c (T) curves shows that the peak effect is due to a crossover from a weak pinning regime to a strong pinning regime.