Flux-dynamics associated with the Second Magnetisation Peak in iron-pnictide Ba_{1-x}K_xFe_2As_2

S. Salem-Sugui, L. Ghivelder, A. D. Alvarenga +7

We report on isofield magnetic relaxation data on a single crystal of $B{a}_{1-x}{K}_{x}F{e}_{2}A{s}_2$ with superconducting transition temperature $T_c$= 32.7 K which exhibit the so called fi…