Polarization coupling in epitaxial ZnO / BaTiO3 thin film heterostructures on SrTiO3 (100) substrates

Michael Lorenz; Matthias Brandt; Jürgen Schubert; Holger Hochmuth; Holger von Wenckstern; Mathias Schubert; Marius Grundmann

doi:10.1117/12.715217

20 February 2007 Polarization coupling in epitaxial ZnO / BaTiO₃ thin film heterostructures on SrTiO₃ (100) substrates

Michael Lorenz, Matthias Brandt, Jürgen Schubert, Holger Hochmuth, Holger von Wenckstern, Mathias Schubert, Marius Grundmann

Author Affiliations +

Proceedings Volume 6474, Zinc Oxide Materials and Devices II; 64741S (2007) https://doi.org/10.1117/12.715217
Event: Integrated Optoelectronic Devices 2007, 2007, San Jose, California, United States

Abstract

Strong polarization coupling is expected by combining ferroelectric materials with switchable polarization and wurtzite layers exhibiting a permanent spontaneous polarization. To demonstrate these charge coupling effects, current-voltage, conductivity-frequency and capacitance-frequency (admittance) characteristics have been measured on epitaxial heterostructures grown of ferroelectric BaTiO₃ (001) films on conducting SrRuO₃ layers on SrTiO₃ (100) substrates with oxide SrRuO_x, metallic Pt and semiconducting ZnO top electrodes. The electrical measurements show clear indications for polarization coupling of the ferroelectric perovskite BaTiO₃ and the piezoelectric wurtzite ZnO thin films.

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Michael Lorenz, Matthias Brandt, Jürgen Schubert, Holger Hochmuth, Holger von Wenckstern, Mathias Schubert, and Marius Grundmann "Polarization coupling in epitaxial ZnO / BaTiO₃ thin film heterostructures on SrTiO₃ (100) substrates", Proc. SPIE 6474, Zinc Oxide Materials and Devices II, 64741S (20 February 2007); https://doi.org/10.1117/12.715217

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