Fabrication of the BiFeO3/Sr0.6Ba0.4Nb2O6/SrRuO3/MgO(001) heterostructure, as well as features of its crystal structure, surface morphology, and physical properties
Stryukov D. V. 1, Matyash Ya. Yu. 1, Strilec N. V.1, Pavlenko A. V. 1, Malomyzheva N. V.2
1Federal Research Center Southern Scientific Center of the Russian Academy of Sciences, Rostov-on-Don, Russia
2Research Institute of Physics of the Southern Federal University, Rostov-on-Don, Russia
Email: strdl@mail.ru, matyash.ya.yu@gmail.com, tolik_260686@mail.ru

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Studies of the crystal structure, surface nanostructure, and properties of the BiFeO3/Sr0.6Ba0.4Nb2O6/ SrRuO3/MgO(001) heterostructure were carried out. Nanosized SrRuO3(25 nm), Sr0.6Ba0.4Nb2O6(100 nm), and BiFeO3(100 nm) films were deposited sequentially on a MgO(001) substrate by RF-cathode sputtering in an oxygen atmosphere. It has been established that there are no impurity phases in the fabricated heterostructure, all layers are grown heteroepitaxially, and the deformation of the unit cell in the upper BiFeO3 layer was 0.28%. It has been shown that during the deposition of each subsequent layer in the series of MgO(001) -> SRO -> SBN60 -> BFO, the surface roughness of the upper film increases from 0.292 nm to 2.977 nm, but the maximum lateral crystallite size is observed for SBN60. The revealed regularities and features in the analysis of the magnetic and ferroelectric properties of the heterostructure obtained by magnetic force microscopy and atomic force microscopy are discussed. Keywords: bismuth ferrite, BiFeO3, SBN60, X-ray diffraction, atomic force microscopy.
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