Abstract
Superconducting HgBa 2CaCu 2O y (Hg-1212) films have been fabricated on the (100) YZrO 2 substrates with YBa 2Cu 3O 7 (YBCO) buffer layers by a two-step process. By using of the YBCO buffer layer reproducible superconducting properties, zero resistance temperatures of T c = 115–124K and critical current density of J c = 0.1 –0.3 MA/cm 2 at 100k in zero magnetic field, were obtained. X-ray diffraction θ-2 θ patterns and Φ scans indicated that the films grow epitaxially on the YBCO surfaces with c-axis perpendicular to the substrates. The results demonstrated that YBCO is a good buffer for growing the Hg-cuprate films. This novel method gives a new way to grow the Hg-cuprate films on various substrates, even on flexible metallic tapes.
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