Magnetization and ac‐loss characteristics of YBa2(Cu1−xFex)3O7superconductors

摘要

The dc hysteresis behavior of the magnetization and the 60‐Hz ac loss characteristics were both measured at 4.2 K as a function of applied field to 2000 Oe on Yba2Cu3O7and on iron‐substituted YBa2(Cu1−xFex)3O7samples withx=0.04 and 0.10. From the dc hysteresis behavior, energy loss per cycle was found to decrease with increasing Fe content. On the other hand, replacing copper with iron up to 4 did not change the 60‐Hz loss, but increasing the iron content up to 10 was found to increase the loss by a significant amount.