Tuning the peak effect in the Y1-xNdxBa2Cu3O7-delta compound

Gokhfeld, D. M.; Balaev, D. A.; Yakimov, I. S.; Petrov, M. I.; Semenov, S. V. CERAMICS INTERNATIONAL, 43 (13):9985-9991; Doi: 10.1016/j.ceramint.2017.05.011 SEP 2017

Polycrystalline Y1−xNdxBa2Cu3O7−δ (x=0.02, 0.11, and 0.25) superconductors are synthesized. Nd atoms are uniformly distributed over grains. The magnetization loops of the samples have a pronounced second peak in a wide temperature range. The magnetization data are analyzed using the extended critical state model. It is found that the order-disorder transition of the vortex lattice is affected by doping with neodymium and temperature; the second-peak field and width decrease monotonically with increasing x value. The undoped polycrystalline YBa2Cu3O7−δ compound is assumed to exhibit the peak effect in higher magnetic fields.