The effects of thermal annealing on the structure and the electrical transport properties of ultrathin gadolinia-doped ceria films grown by pulsed laser deposition

Katarzyna Agnieszka Rodrigo, S. Heiroth, Nini Pryds, Luise Theil Kuhn, Vincenzo Esposito, Søren Linderoth, Jørgen Schou, T. Lippert

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Ultrathin crystalline films of 10 mol% gadolinia-doped ceria (CGO10) are grown on MgO (100) substrates by pulsed laser deposition at a moderate temperature of 400°C. As-deposited CGO10 layers of approximately 4 nm, 14 nm, and 22 nm thickness consist of fine grains with dimensions ≤∼11 nm. The films show high density within the thickness probed in the X-ray reflectivity experiments. Thermally activated grain growth, density decrease, and film surface roughening, which may result in the formation of incoherent CGO10 islands by dewetting below a critical film thickness, are observed upon heat treatment at 400°C and 800°C. The effect of the grain coarsening on the electrical characteristics of the layers is investigated and discussed in the context of a variation of the number density of grain boundaries. The results are evaluated with regard to the use of ultrathin CGO10 films as seeding templates for the moderate temperature growth of thick solid electrolyte films with improved oxygen transport properties.
Original languageEnglish
JournalApplied Physics A: Materials Science & Processing
Volume104
Issue number3
Pages (from-to)845-850
ISSN0947-8396
DOIs
Publication statusPublished - 2011

Keywords

  • Magnetic refrigeration

Cite this

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title = "The effects of thermal annealing on the structure and the electrical transport properties of ultrathin gadolinia-doped ceria films grown by pulsed laser deposition",
abstract = "Ultrathin crystalline films of 10 mol{\%} gadolinia-doped ceria (CGO10) are grown on MgO (100) substrates by pulsed laser deposition at a moderate temperature of 400°C. As-deposited CGO10 layers of approximately 4 nm, 14 nm, and 22 nm thickness consist of fine grains with dimensions ≤∼11 nm. The films show high density within the thickness probed in the X-ray reflectivity experiments. Thermally activated grain growth, density decrease, and film surface roughening, which may result in the formation of incoherent CGO10 islands by dewetting below a critical film thickness, are observed upon heat treatment at 400°C and 800°C. The effect of the grain coarsening on the electrical characteristics of the layers is investigated and discussed in the context of a variation of the number density of grain boundaries. The results are evaluated with regard to the use of ultrathin CGO10 films as seeding templates for the moderate temperature growth of thick solid electrolyte films with improved oxygen transport properties.",
keywords = "Magnetic refrigeration, Magnetisk k{\o}ling",
author = "Rodrigo, {Katarzyna Agnieszka} and S. Heiroth and Nini Pryds and Kuhn, {Luise Theil} and Vincenzo Esposito and S{\o}ren Linderoth and J{\o}rgen Schou and T. Lippert",
year = "2011",
doi = "10.1007/s00339-011-6424-y",
language = "English",
volume = "104",
pages = "845--850",
journal = "Applied Physics A: Materials Science & Processing",
issn = "0947-8396",
publisher = "Springer",
number = "3",

}

TY - JOUR

T1 - The effects of thermal annealing on the structure and the electrical transport properties of ultrathin gadolinia-doped ceria films grown by pulsed laser deposition

AU - Rodrigo, Katarzyna Agnieszka

AU - Heiroth, S.

AU - Pryds, Nini

AU - Kuhn, Luise Theil

AU - Esposito, Vincenzo

AU - Linderoth, Søren

AU - Schou, Jørgen

AU - Lippert, T.

PY - 2011

Y1 - 2011

N2 - Ultrathin crystalline films of 10 mol% gadolinia-doped ceria (CGO10) are grown on MgO (100) substrates by pulsed laser deposition at a moderate temperature of 400°C. As-deposited CGO10 layers of approximately 4 nm, 14 nm, and 22 nm thickness consist of fine grains with dimensions ≤∼11 nm. The films show high density within the thickness probed in the X-ray reflectivity experiments. Thermally activated grain growth, density decrease, and film surface roughening, which may result in the formation of incoherent CGO10 islands by dewetting below a critical film thickness, are observed upon heat treatment at 400°C and 800°C. The effect of the grain coarsening on the electrical characteristics of the layers is investigated and discussed in the context of a variation of the number density of grain boundaries. The results are evaluated with regard to the use of ultrathin CGO10 films as seeding templates for the moderate temperature growth of thick solid electrolyte films with improved oxygen transport properties.

AB - Ultrathin crystalline films of 10 mol% gadolinia-doped ceria (CGO10) are grown on MgO (100) substrates by pulsed laser deposition at a moderate temperature of 400°C. As-deposited CGO10 layers of approximately 4 nm, 14 nm, and 22 nm thickness consist of fine grains with dimensions ≤∼11 nm. The films show high density within the thickness probed in the X-ray reflectivity experiments. Thermally activated grain growth, density decrease, and film surface roughening, which may result in the formation of incoherent CGO10 islands by dewetting below a critical film thickness, are observed upon heat treatment at 400°C and 800°C. The effect of the grain coarsening on the electrical characteristics of the layers is investigated and discussed in the context of a variation of the number density of grain boundaries. The results are evaluated with regard to the use of ultrathin CGO10 films as seeding templates for the moderate temperature growth of thick solid electrolyte films with improved oxygen transport properties.

KW - Magnetic refrigeration

KW - Magnetisk køling

U2 - 10.1007/s00339-011-6424-y

DO - 10.1007/s00339-011-6424-y

M3 - Journal article

VL - 104

SP - 845

EP - 850

JO - Applied Physics A: Materials Science & Processing

JF - Applied Physics A: Materials Science & Processing

SN - 0947-8396

IS - 3

ER -