Real-time observations of ultra-thin iron oxide film growth on oxygen-deficient YSZ(001)

Ivan Ermanoski, G. L. Kellogg

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We use low energy electron microscopy (LEEM) and low energy electron diffraction (LEED) to characterize the initial stages of iron oxide film growth on oxygen-deficient YSZ(001). The films are grown by Fe deposition in a background of 10- 6 to 10- 5 Torr O2. The first layer grows as FeO(111) with four non-equivalent domains arising from two rotational orientations and two stacking sequences. Uniform spreading of 2-D islands is observed by initiating growth at ~ 1000 C and raising the temperature to 1110-1145 C during Fe deposition. The growth is anisotropic with the fast growth direction depending strongly on both the rotational and stacking domain structure, most likely the result of preferred O2 dissociation at specific island edge configurations. The FeO(111) film has a distinct LEEM-IV spectrum with three well-defined maxima and is easily distinguished from the YSZ(001) substrate. The coarsening of small islands (< 10 nm diameter) at temperatures above 1160 C rotates the film orientation by 15 with respect to the substrate and reduces the coverage by about one half suggesting a dewetting process. After completion of the first layer, islands with a surface lattice constant corresponding to Fe3O4/γ-Fe 2O3 appear with a LEEM-IV fingerprint different from both FeO(111) and the YSZ(001) substrate.

Original languageEnglish (US)
Pages (from-to)1-11
Number of pages11
JournalSurface Science
Volume614
DOIs
StatePublished - Aug 1 2013

Fingerprint

Film growth
yttria-stabilized zirconia
Iron oxides
iron oxides
Electron microscopy
Oxide films
oxide films
Oxygen
electron microscopy
oxygen
Substrates
Low energy electron diffraction
Coarsening
Lattice constants
energy
drying
Temperature
electron diffraction
dissociation
temperature

Keywords

  • Low energy electron diffraction
  • Low energy electron microscopy
  • Oxide surfaces
  • Thin film growth

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Real-time observations of ultra-thin iron oxide film growth on oxygen-deficient YSZ(001). / Ermanoski, Ivan; Kellogg, G. L.

In: Surface Science, Vol. 614, 01.08.2013, p. 1-11.

Research output: Contribution to journalArticle

@article{75d16c742fac40fba2786831250554ca,
title = "Real-time observations of ultra-thin iron oxide film growth on oxygen-deficient YSZ(001)",
abstract = "We use low energy electron microscopy (LEEM) and low energy electron diffraction (LEED) to characterize the initial stages of iron oxide film growth on oxygen-deficient YSZ(001). The films are grown by Fe deposition in a background of 10- 6 to 10- 5 Torr O2. The first layer grows as FeO(111) with four non-equivalent domains arising from two rotational orientations and two stacking sequences. Uniform spreading of 2-D islands is observed by initiating growth at ~ 1000 C and raising the temperature to 1110-1145 C during Fe deposition. The growth is anisotropic with the fast growth direction depending strongly on both the rotational and stacking domain structure, most likely the result of preferred O2 dissociation at specific island edge configurations. The FeO(111) film has a distinct LEEM-IV spectrum with three well-defined maxima and is easily distinguished from the YSZ(001) substrate. The coarsening of small islands (< 10 nm diameter) at temperatures above 1160 C rotates the film orientation by 15 with respect to the substrate and reduces the coverage by about one half suggesting a dewetting process. After completion of the first layer, islands with a surface lattice constant corresponding to Fe3O4/γ-Fe 2O3 appear with a LEEM-IV fingerprint different from both FeO(111) and the YSZ(001) substrate.",
keywords = "Low energy electron diffraction, Low energy electron microscopy, Oxide surfaces, Thin film growth",
author = "Ivan Ermanoski and Kellogg, {G. L.}",
year = "2013",
month = "8",
day = "1",
doi = "10.1016/j.susc.2013.03.023",
language = "English (US)",
volume = "614",
pages = "1--11",
journal = "Surface Science",
issn = "0039-6028",
publisher = "Elsevier",

}

TY - JOUR

T1 - Real-time observations of ultra-thin iron oxide film growth on oxygen-deficient YSZ(001)

AU - Ermanoski, Ivan

AU - Kellogg, G. L.

PY - 2013/8/1

Y1 - 2013/8/1

N2 - We use low energy electron microscopy (LEEM) and low energy electron diffraction (LEED) to characterize the initial stages of iron oxide film growth on oxygen-deficient YSZ(001). The films are grown by Fe deposition in a background of 10- 6 to 10- 5 Torr O2. The first layer grows as FeO(111) with four non-equivalent domains arising from two rotational orientations and two stacking sequences. Uniform spreading of 2-D islands is observed by initiating growth at ~ 1000 C and raising the temperature to 1110-1145 C during Fe deposition. The growth is anisotropic with the fast growth direction depending strongly on both the rotational and stacking domain structure, most likely the result of preferred O2 dissociation at specific island edge configurations. The FeO(111) film has a distinct LEEM-IV spectrum with three well-defined maxima and is easily distinguished from the YSZ(001) substrate. The coarsening of small islands (< 10 nm diameter) at temperatures above 1160 C rotates the film orientation by 15 with respect to the substrate and reduces the coverage by about one half suggesting a dewetting process. After completion of the first layer, islands with a surface lattice constant corresponding to Fe3O4/γ-Fe 2O3 appear with a LEEM-IV fingerprint different from both FeO(111) and the YSZ(001) substrate.

AB - We use low energy electron microscopy (LEEM) and low energy electron diffraction (LEED) to characterize the initial stages of iron oxide film growth on oxygen-deficient YSZ(001). The films are grown by Fe deposition in a background of 10- 6 to 10- 5 Torr O2. The first layer grows as FeO(111) with four non-equivalent domains arising from two rotational orientations and two stacking sequences. Uniform spreading of 2-D islands is observed by initiating growth at ~ 1000 C and raising the temperature to 1110-1145 C during Fe deposition. The growth is anisotropic with the fast growth direction depending strongly on both the rotational and stacking domain structure, most likely the result of preferred O2 dissociation at specific island edge configurations. The FeO(111) film has a distinct LEEM-IV spectrum with three well-defined maxima and is easily distinguished from the YSZ(001) substrate. The coarsening of small islands (< 10 nm diameter) at temperatures above 1160 C rotates the film orientation by 15 with respect to the substrate and reduces the coverage by about one half suggesting a dewetting process. After completion of the first layer, islands with a surface lattice constant corresponding to Fe3O4/γ-Fe 2O3 appear with a LEEM-IV fingerprint different from both FeO(111) and the YSZ(001) substrate.

KW - Low energy electron diffraction

KW - Low energy electron microscopy

KW - Oxide surfaces

KW - Thin film growth

UR - http://www.scopus.com/inward/record.url?scp=84877770317&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84877770317&partnerID=8YFLogxK

U2 - 10.1016/j.susc.2013.03.023

DO - 10.1016/j.susc.2013.03.023

M3 - Article

AN - SCOPUS:84877770317

VL - 614

SP - 1

EP - 11

JO - Surface Science

JF - Surface Science

SN - 0039-6028

ER -