積層された酸化物超伝導体の磁束ピン止め

抄録

Multilayered YBa₂Cu₃O_6.8/YBa₂(Cu_1-xNi_x)₃O_7-y and YBa₂Cu₃O_6.8/Bi₂Sr₂Ca_n-1Cu_nO_x (n=1, 2, 3) superconducting films have been grown by laser deposition technique. Critical currents were measured in the external magnetic field up to 5 tesla with different thicknesses of the interlayers. Results show that control of the number of layers as well as the thickness in multilayer structures could provide an effective means for improving the critical current in magnetic fields.