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RESEARCH PRODUCT

Ferroelectric Properties and Crystal Structure of YBa2Cu3O7/BaxSr(1−x)TiO3 Heterostructures

F. MartinJ.c. MartinezGerhard JakobH. AdrianCh. Schwan

subject

PermittivityPhase transitionMaterials scienceCondensed matter physicsSputteringHeterojunctionConductivityEpitaxyMicrostructureFerroelectricity

description

ABSTRACTEpitaxial YBa2Cu3O7/Ba0.5Sr0.5TiO3 (YBCO/BST) and YBCO/BaTiO3 (BTO) heterostructures were prepared by dc and rf sputtering on SrTiO3 and MgO substrates. The YBCO/BTO bilayers exhibit an inductive superconducting transition temperature of 85 K and the ferroelectric phase transition of BST shows a Curie-Weiss temperature of 310 K. Microstructure was investigated by x-ray-diffraction and atomic force microscopy. In this work we also studied the insulator's conductivity and the contribution of domain walls to permittivity.

https://doi.org/10.1557/proc-493-93