[16p-W9_325-1~10] 11.2 Thin and thick superconducting films, coated conductors and film crystal growth

4:00 PM - 4:15 PM JST(7:00 AM - 7:15 AM UTC)

[16p-W9_325-10] Fabrication of free-standing GdBa₂Cu₃O_7-δ thin films via optimized buffer layer design

Kose Morinaga¹, Kai Walter², Jens Haenisch², Takafumi Hatano³, Hongye Gao⁴, Satoshi Hata⁴, 〇Kazumasa Iida¹ (1.Nihon Univ., 2.Karlsruhe Inst., 3.Nagoya Univ., 4.Kyushu Univ.)

Keywords:

cuprates,free-standing membrane

Free-standing superconducting thin films allow the intrinsic properties of materials to be studied without substrate effects. In this work, we successfully fabricated free-standing GdBa₂Cu₃O_7-δ thin films by optimizing buffer-layer structures and combining a thermal release tape with a protective amorphous Al₂O₃ layer. The films were cleanly separated from the substrate, and their superconducting transition temperature and structure remained almost unchanged after lift-off, demonstrating the effectiveness of this approach.