Anomalous grain growth in the surface region of a nanocrystalline CeO 2 film under low-temperature heavy ion irradiation

P. D. Edmondson, Y. Zhang, S. Moll, T. Varga, Fereydoon Namavar, W. J. Weber

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Grain growth and phase stability of nanocrystalline ceria are investigated under ion irradiation at different temperatures. Irradiations at temperatures of 300 and 400 K result in uniform grain growth throughout the film. Anomalous grain growth is observed in thin films of nanocrystalline ceria under 3-MeV Au + irradiation at 160 K. At this low temperature, significant grain growth is observed within 100 nm from the surface, and no obvious growth is detected in the rest of the films. While the grain growth is attributed to a defect-stimulated mechanism at room temperature and above, a defect diffusion-limited mechanism is significant at low temperatures with the primary defect responsible being the oxygen vacancy. The nanocrystalline grains remain in the cubic phase regardless of defect kinetics.

Original languageEnglish (US)
Article number214113
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number21
DOIs
StatePublished - Jun 15 2012

Fingerprint

Heavy Ions
Ion bombardment
ion irradiation
Grain growth
Heavy ions
heavy ions
Defects
Cerium compounds
defects
Temperature
Irradiation
Phase stability
Oxygen vacancies
irradiation
Thin films
Kinetics
temperature
kinetics
room temperature
oxygen

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Anomalous grain growth in the surface region of a nanocrystalline CeO 2 film under low-temperature heavy ion irradiation. / Edmondson, P. D.; Zhang, Y.; Moll, S.; Varga, T.; Namavar, Fereydoon; Weber, W. J.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 85, No. 21, 214113, 15.06.2012.

Research output: Contribution to journalArticle

Edmondson, P. D. ; Zhang, Y. ; Moll, S. ; Varga, T. ; Namavar, Fereydoon ; Weber, W. J. / Anomalous grain growth in the surface region of a nanocrystalline CeO 2 film under low-temperature heavy ion irradiation. In: Physical Review B - Condensed Matter and Materials Physics. 2012 ; Vol. 85, No. 21.
@article{2d54621aebf345c5a277959e2d3509a5,
title = "Anomalous grain growth in the surface region of a nanocrystalline CeO 2 film under low-temperature heavy ion irradiation",
abstract = "Grain growth and phase stability of nanocrystalline ceria are investigated under ion irradiation at different temperatures. Irradiations at temperatures of 300 and 400 K result in uniform grain growth throughout the film. Anomalous grain growth is observed in thin films of nanocrystalline ceria under 3-MeV Au + irradiation at 160 K. At this low temperature, significant grain growth is observed within 100 nm from the surface, and no obvious growth is detected in the rest of the films. While the grain growth is attributed to a defect-stimulated mechanism at room temperature and above, a defect diffusion-limited mechanism is significant at low temperatures with the primary defect responsible being the oxygen vacancy. The nanocrystalline grains remain in the cubic phase regardless of defect kinetics.",
author = "Edmondson, {P. D.} and Y. Zhang and S. Moll and T. Varga and Fereydoon Namavar and Weber, {W. J.}",
year = "2012",
month = "6",
day = "15",
doi = "10.1103/PhysRevB.85.214113",
language = "English (US)",
volume = "85",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Institute of Physics Publising LLC",
number = "21",

}

TY - JOUR

T1 - Anomalous grain growth in the surface region of a nanocrystalline CeO 2 film under low-temperature heavy ion irradiation

AU - Edmondson, P. D.

AU - Zhang, Y.

AU - Moll, S.

AU - Varga, T.

AU - Namavar, Fereydoon

AU - Weber, W. J.

PY - 2012/6/15

Y1 - 2012/6/15

N2 - Grain growth and phase stability of nanocrystalline ceria are investigated under ion irradiation at different temperatures. Irradiations at temperatures of 300 and 400 K result in uniform grain growth throughout the film. Anomalous grain growth is observed in thin films of nanocrystalline ceria under 3-MeV Au + irradiation at 160 K. At this low temperature, significant grain growth is observed within 100 nm from the surface, and no obvious growth is detected in the rest of the films. While the grain growth is attributed to a defect-stimulated mechanism at room temperature and above, a defect diffusion-limited mechanism is significant at low temperatures with the primary defect responsible being the oxygen vacancy. The nanocrystalline grains remain in the cubic phase regardless of defect kinetics.

AB - Grain growth and phase stability of nanocrystalline ceria are investigated under ion irradiation at different temperatures. Irradiations at temperatures of 300 and 400 K result in uniform grain growth throughout the film. Anomalous grain growth is observed in thin films of nanocrystalline ceria under 3-MeV Au + irradiation at 160 K. At this low temperature, significant grain growth is observed within 100 nm from the surface, and no obvious growth is detected in the rest of the films. While the grain growth is attributed to a defect-stimulated mechanism at room temperature and above, a defect diffusion-limited mechanism is significant at low temperatures with the primary defect responsible being the oxygen vacancy. The nanocrystalline grains remain in the cubic phase regardless of defect kinetics.

UR - http://www.scopus.com/inward/record.url?scp=84862651381&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84862651381&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.85.214113

DO - 10.1103/PhysRevB.85.214113

M3 - Article

VL - 85

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 21

M1 - 214113

ER -