Low-loss YBa[sub 2]Cu[sub 3]O[sub 7] films on flexible, polycrystalline-yttria-stabilized zirconia tapes for cryoelectronic applications

Harshavardhan, K. S.; Christen, H. M.; Silliman, S. D.; Talanov, V. V.; Anlage, S. M.; Rajeswari, M.; Claassen, J.
March 2001
Applied Physics Letters;3/26/2001, Vol. 78 Issue 13, p1888
Academic Journal
High-temperature superconducting films on flexible, low-thermal conductivity, low-loss substrates offer a unique base for the development of cryoelectronic digital interconnects. Using an ion-beam-assisted pulsed-laser-deposition technique, we developed biaxially textured YBa[sub 2]Cu[sub 3]O[sub 7] (YBCO) films on flexible polycrystalline-yttria-stabilized zirconia (YSZ) substrates with the following materials properties: (i) in-plane x-ray Φ-scan full width at half maximum of ∼7°; (ii) transition temperatures (T[sub c]) in the range of 88-89 K with transition widths (ΔT[sub c]) of ∼0.5 K; (iii) critical current densities (J[sub c]) in the range 1.5-2x10[sup 6] A/cm[sup 2] at 77 K, zero field; (iv) magnetic penetration depth (λ) of 284 nm at 77 K; and (v) surface resistance (R[sub s]) of 700 μΩ at 77 K, 10 GHz. The low-microwave loss, biaxilly textured YBCO films combined with the low-thermal conductivity YSZ substrate could facilitate a variety of RF cryoelectronic applications. © 2001 American Institute of Physics.


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