Thermal Resistance at the Epitaxial Interface of YBaCuO and PrBaCuO

Abstract

Among classical applications of superconductivity, superconductor bolometers representing a superconducting thin-film strip in the resistive state occupy an important place [1-4]. The present study concerns HTSC bolometer samples based on YBa₂Cu₃O_7−δ with a PrBa₂Cu₃O_x protective layer. For the first time, the thermal resistance at the YBa₂Cu₃O_7−δ-PrBa₂Cu₃O_x epitaxial interface is quantitatively estimated from the response to pulses of a Ti:Al₂O₃ laser as (0.3 ÷ 1.3) · 10⁻³ K·cm²/W.