Establishing of peak effect in YBCO by Nd substitution

Gokhfeld, D. M.; Semenov, S. V.; Balaev, D. A.; Yakimov, I. S.; Dubrovskiy, A. A.; Terentyev, K. Yu.; Freydman, A. L.; Krasikov, A. A.; Petrov, M. I. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 440 127-128; Doi:10.1016/j.jmmm.2016.12.089 OCT 15 2017

Y_0.75Nd_0.25Ba₂Cu₃O_7−d superconductor has the peak effect with pronounced fishtail feature on magnetization hysteresis. The magnetic field of the peak effect maximum is in ~4 times higher than one of NdBa₂Cu₃O_7−d. The magnetization hysteresis is tilted anticlockwise due to paramagnetic Nd³⁺ ions occurred on the surface of grains and in the vortex cores.