Nanoscale study of perovskite BiFeO3/spinel (Fe,Zn)3O4 co-deposited thin film by electrical scanning probe methods

Borowiak, Alexis; Okada, Koichi; Kanki, Teruo; Gautier, Brice; Vilquin, Bertrand; Tanaka, Hidekazu

doi:10.1016/j.apsusc.2015.05.172

Cited by 9 publications

(2 citation statements)

References 25 publications

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“…[33] However, in a number of reports no significant conductivity along the GBs in polycrystalline BFO-based films has been observed. [34][35][36] In this work, we study local polarization and conductivity distribution inside the grains and at the GBs in BFO films prepared by sol-gel technique in order to uncover the mechanism of their interrelation in polycrystalline ferroelectric materials. Though in widely accepted models of charge transport across GBs the polarization discontinuity at GBs is not taken into account, the variation of space charge concentration at the GBs is expected to depend on the spontaneous polarization in the adjacent grains.…”

Section: Introductionmentioning

confidence: 99%

Polarization-dependent Conductivity of Grain Boundaries in BiFeO3 Thin Films

Аликин

Fomichоv

Reis

et al. 2019

Proceedings of the nanoGe Fall Meeting 2019

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Charge transport across the interfaces in complex oxides attracts a lot of attention because it allows creating novel functionalities useful for device applications. In particular, it has been observed that movable domain walls in epitaxial BiFeO 3 films possess enhanced conductivity that can be used for read out in ferroelectric-based memories. In this work, the relation between the polarization and conductivity in sol-gel BiFeO 3 films with special emphasis on grain boundaries as natural interfaces in polycrystalline ferroelectrics is investigated. The grains exhibit self-organized domain structure in these films, so that the "domain clusters" consisting of several grains with aligned polarization directions are formed. Surprisingly, grain boundaries between these clusters (with antiparallel polarization direction) have significantly higher electrical conductivity in comparison to "inter-cluster" grain boundaries, in which the conductivity was even smaller than in the bulk. As such, polarization-dependent

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Section: Introductionmentioning

confidence: 99%

Polarization-dependent Conductivity of Grain Boundaries in BiFeO3 Thin Films

Аликин

Fomichоv

Reis

et al. 2019

Proceedings of the nanoGe Fall Meeting 2019

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“…A nanoscale study of oxide thin films by C-AFM and PFM has been reported in the literature. 12) PFM was operated near the resonance of the cantilever in order to record the piezoelectric properties of the ZnO-NiO samples with a frequency range of 100-130 kHz and V ac = ±2 V. Conductive Au-coated cantilevers were used to record the PFM and C-AFM images.…”

mentioning

confidence: 99%

Epitaxial crystallization of self-assembled ZnO–NiO nanopillar system

Nakagawara

Okada

Borowiak

et al. 2017

Appl. Phys. Express

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We demonstrate a self-assembled ZnO–NiO nanopillar system with a three-dimensional structure as a ZnO-based heterostructure. By designing a three-dimensional epitaxial combination of phase-separated oxide materials and a single-crystal substrate, epitaxial NiO pillars 20–50 nm in diameter and embedded in a ZnO matrix were successfully created on an SrTiO3(111) substrate. The geometry agreed well with the design on the basis of the lattice matching of the film/substrate materials and the thin-film growth modes. Conductive-atomic force microscopy and piezoresponse force microscopy measurements revealed a highly doped semiconducting and piezoelectric ZnO matrix and lightly doped semiconducting and non-piezoelectric NiO pillars.

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Self-assembled Nanocomposite Oxide Films

Kanki

Tanaka

2016

Correlated Functional Oxides

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Nanoscale study of perovskite BiFeO3/spinel (Fe,Zn)3O4 co-deposited thin film by electrical scanning probe methods

Cited by 9 publications

References 25 publications

Polarization-dependent Conductivity of Grain Boundaries in BiFeO3 Thin Films

Polarization-dependent Conductivity of Grain Boundaries in BiFeO3 Thin Films

Epitaxial crystallization of self-assembled ZnO–NiO nanopillar system

Self-assembled Nanocomposite Oxide Films

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