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RESEARCH PRODUCT
Ferroelectric Properties and Crystal Structure of YBa2Cu3O7/BaxSr(1−x)TiO3 Heterostructures
F. MartinJ.c. MartinezGerhard JakobH. AdrianCh. Schwansubject
PermittivityPhase transitionMaterials scienceCondensed matter physicsSputteringHeterojunctionConductivityEpitaxyMicrostructureFerroelectricitydescription
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.
year | journal | country | edition | language |
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1997-01-01 | MRS Proceedings |