Peak Effects in EuBa2Cu3Oy Crystal Prepared by Melt-Textured Growth Method

The magnetization curves of EuBa2Cu3Oy crystal prepared by melt-textured growth method were measured from 1.5 to 87 K up to field 7.5 T for H || C and H ⊥ C. Peak effects were observed at 60, 70 and 73 K for H || C, and 70, 73 and 77 K for H ⊥ C. It is shown that the magnetic field Hp at which the magnetization or critical current reach their extremum is approximately independent of temperature and the peak effects observed can be explained by matching effects.