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2 Feb 1998

Volume 72, Issue 5, pp. 513-622

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Structure and polarization in epitaxial ferroelectric PbZr0.52Ti0.48O3/YBa2Cu3O7−x/Nd:YAlO3 thin films

A. M. Grishin, M. Yamazato, Y. Yamagata, and K. Ebihara

Appl. Phys. Lett. 72, 620 (1998); http://dx.doi.org/10.1063/1.120824 (3 pages) | Cited 14 times

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We fabricate epitaxial PbZr0.52Ti0.48O3/YBa2Cu3O7−x submicron film ferroelectric/superconductor heterostructures on the single-crystal YAlO3+1%Nd2O3 substrate by the pulsed laser deposition technique. Frequency independent low loss tan δ = 0.04 and dielectric constant of 950, high electric resistivity ρ (150 kV/cm)=6×1011Ω cm, remnant polarization of 32 μC/cm2, no visible fatigue after 107 short bipolar pulses switching indicate excellent electrical performance of the new capacitor structure. The slight crystallite polar axis misalignment and depolarizing effect were found to be responsible for the shape of the apparent polarization loop. The only fitting parameter depolarizing coefficient N = 2.37×10−4 gives the best fit between theory and experimental data and corresponds to prolate ellipsoidal shaped crystallites with the length-to-diameter ratio of 140. © 1998 American Institute of Physics.
Show PACS
74.78.-w Superconducting films and low-dimensional structures
77.55.-g Dielectric thin films
81.15.Fg Pulsed laser ablation deposition
77.22.Ej Polarization and depolarization
74.72.-h Cuprate superconductors
77.80.Dj Domain structure; hysteresis
77.22.Ch Permittivity (dielectric function)
77.22.Gm Dielectric loss and relaxation
84.32.Tt Capacitors
85.50.-n Dielectric, ferroelectric, and piezoelectric devices
77.84.Ek Niobates and tantalates
77.84.Cg PZT ceramics and other titanates
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