Effects of electrostatic field strength on grain‐boundary core structures in SrTiO 3

Hughes, Lauren A.; van Benthem, Klaus

doi:10.1111/jace.16344

Title: Effects of electrostatic field strength on grain‐boundary core structures in SrTiO ₃

Journal Article · Mon Feb 25 00:00:00 EST 2019 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/jace.16344· OSTI ID:1496647

Hughes, Lauren A. ^[1];

^[1]

Department of Materials Science and Engineering University of California Davis California

Abstract Understanding interactions between externally applied electric fields and the interfacial structures of nanoscale ceramics is important for controlling their functional properties. In ceramic oxides, functional properties are determined by oxygen vacancy concentrations near and within grain‐boundary core structures. In this study it is shown that the application of electrostatic fields ranging from 0 to nominally 170 V/cm during diffusion bonding of bicrystals alters the atomic and electronic core structures of (100) twist grain boundaries in SrTiO ₃ . The applied electric field strength affects local oxygen vacancy concentrations and ordering of the oxygen sublattice. Results for this model system indicate that electrostatic fields applied during ceramic manufacturing can be employed as a new processing parameter to tailor defect structure configurations and obtain unprecedented ceramic microstructures. The ability to manipulate interface configurations with electric fields in the absence of any sintering additives may have far reaching implications for tuning polarization and band structures in electroceramics while avoiding effects of often unwanted dopants.

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Sponsoring Organization:: USDOE

OSTI ID:: 1496647

Journal Information:: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Vol. 102 Journal Issue: 8; ISSN 0002-7820

Publisher:: Wiley-BlackwellCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 4 works

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References (36)

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Title: Effects of electrostatic field strength on grain‐boundary core structures in SrTiO ₃