Phase Transitions During Ion-Beam Irradiation of the Perovskite-structure Oxides

Author:

Meldrum A.,Boatner L. A.,Ewingt R. C.

Abstract

ABSTRACTSeveral perovskite-structure oxide compounds, including CaTiO3, SrTiO3, BaTiO3, KNbO3, and KTaO3 were irradiated by 800 keV Kr+ ions in order to investigate and compare their response to heavy-ion irradiation. The critical amorphization temperature Tc, above which amorphization could not be induced, was found to increase in the order SrTiO3 → CaTiO3 → BaTiO3 → KNbO3 → KTaO3. No single physical parameter explains the observed sequence, although Tc correlates well with the melting temperatures. The well-known solid state phase transformations in these materials did not have a significant effect on the dose required for amorphization. Domain boundaries were observed in the pristine samples; however, after only a low dose, the boundaries became poorly defined and, with increasing dose, eventually disappeared. Dislocation loops were observed to aggregate at the domain boundaries.

Publisher

Springer Science and Business Media LLC

Subject

General Engineering

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1. Mechanical tailoring of dislocations in ceramics at room temperature: A perspective;Journal of the American Ceramic Society;2023-08-17

2. Role of the interface on radiation damage in the SrTiO3/LaAlO3heterostructure under Ne2+ion irradiation;Journal of Applied Physics;2014-03-28

3. Radiation damage in heteroepitaxial BaTiO3 thin films on SrTiO3 under Ne ion irradiation;Journal of Applied Physics;2013-01-14

4. An attempt to correlate ion irradiation behaviour and chemical durability of titanate- and zirconate-based ceramics;Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms;2008-06

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