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Title: Structural phase diagram for ultra-thin epitaxial Fe3O4 / MgO(0 01) films: thickness and oxygen pressure dependence

Abstract

A systematic investigation of the thickness and oxygen pressure dependence for the structural properties of ultra-thin epitaxial magnetite (Fe3O4) films has been carried out; for such films, the structural properties generally differ from those for the bulk when the thickness ≤10 nm. Iron oxide ultra-thin films with thicknesses varying from 3 nm to 20 nm were grown on MgO (001) substrates using molecular beam epitaxy under different oxygen pressures ranging from 1 × 10-7 torr to 1 × 10-5 torr. The crystallographic and electronic structures of the films were characterized using low energy electron diffraction (LEED) and x-ray photoemission spectroscopy (XPS), respectively. Moreover, the quality of the epitaxial Fe3O4 ultra-thin films was judged by magnetic measurements of the Verwey transition, along with complementary XPS spectra. We observed that under the same growth conditions the stoichiometry of ultra-thin films under 10 nm transforms from the Fe3O4 phase to the FeO phase. In this work, a phase diagram based on thickness and oxygen pressure has been constructed to explain the structural phase transformation. It was found that high-quality magnetite films with thicknesses ≤20 nm formed within a narrow range of oxygen pressure. An optimal and controlled growth process is a crucial requirementmore » for the accurate study of the magnetic and electronic properties for ultra-thin Fe3O4 films. Furthermore, these results are significant because they may indicate a general trend in the growth of other oxide films, which has not been previously observed or considered.« less

Authors:
 [1];  [1];  [1];  [2];  [1]
  1. Univ. of Connecticut, Storrs, CT (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1248806
Alternate Identifier(s):
OSTI ID: 1238405
Report Number(s):
BNL-112061-2016-JA
Journal ID: ISSN 0953-8984; R&D Project: PO010; KC0201060
Grant/Contract Number:  
SC00112704; No. DE-SC00112704
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physics. Condensed Matter
Additional Journal Information:
Journal Volume: 28; Journal Issue: 11; Journal ID: ISSN 0953-8984
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Alraddadi, S., Hines, W., Yilmaz, T., Gu, G. D., and Sinkovic, B.. Structural phase diagram for ultra-thin epitaxial Fe3O4 / MgO(0 01) films: thickness and oxygen pressure dependence. United States: N. p., 2016. Web. https://doi.org/10.1088/0953-8984/28/11/115402.
Alraddadi, S., Hines, W., Yilmaz, T., Gu, G. D., & Sinkovic, B.. Structural phase diagram for ultra-thin epitaxial Fe3O4 / MgO(0 01) films: thickness and oxygen pressure dependence. United States. https://doi.org/10.1088/0953-8984/28/11/115402
Alraddadi, S., Hines, W., Yilmaz, T., Gu, G. D., and Sinkovic, B.. Fri . "Structural phase diagram for ultra-thin epitaxial Fe3O4 / MgO(0 01) films: thickness and oxygen pressure dependence". United States. https://doi.org/10.1088/0953-8984/28/11/115402. https://www.osti.gov/servlets/purl/1248806.
@article{osti_1248806,
title = {Structural phase diagram for ultra-thin epitaxial Fe3O4 / MgO(0 01) films: thickness and oxygen pressure dependence},
author = {Alraddadi, S. and Hines, W. and Yilmaz, T. and Gu, G. D. and Sinkovic, B.},
abstractNote = {A systematic investigation of the thickness and oxygen pressure dependence for the structural properties of ultra-thin epitaxial magnetite (Fe3O4) films has been carried out; for such films, the structural properties generally differ from those for the bulk when the thickness ≤10 nm. Iron oxide ultra-thin films with thicknesses varying from 3 nm to 20 nm were grown on MgO (001) substrates using molecular beam epitaxy under different oxygen pressures ranging from 1 × 10-7 torr to 1 × 10-5 torr. The crystallographic and electronic structures of the films were characterized using low energy electron diffraction (LEED) and x-ray photoemission spectroscopy (XPS), respectively. Moreover, the quality of the epitaxial Fe3O4 ultra-thin films was judged by magnetic measurements of the Verwey transition, along with complementary XPS spectra. We observed that under the same growth conditions the stoichiometry of ultra-thin films under 10 nm transforms from the Fe3O4 phase to the FeO phase. In this work, a phase diagram based on thickness and oxygen pressure has been constructed to explain the structural phase transformation. It was found that high-quality magnetite films with thicknesses ≤20 nm formed within a narrow range of oxygen pressure. An optimal and controlled growth process is a crucial requirement for the accurate study of the magnetic and electronic properties for ultra-thin Fe3O4 films. Furthermore, these results are significant because they may indicate a general trend in the growth of other oxide films, which has not been previously observed or considered.},
doi = {10.1088/0953-8984/28/11/115402},
journal = {Journal of Physics. Condensed Matter},
number = 11,
volume = 28,
place = {United States},
year = {2016},
month = {2}
}

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Works referenced in this record:

Preparation and characterization of epitaxial iron oxide films
journal, July 1998

  • Gao, Y.; Kim, Y. J.; Chambers, S. A.
  • Journal of Materials Research, Vol. 13, Issue 7
  • DOI: 10.1557/jmr.1998.0281

Effects of oxygen annealing on the physical properties and surface microstructures of La 0.8 Ba 0.2 MnO 3 films
journal, November 2002


Analysis of the Verwey transition in magnetite
journal, October 1995


Growth of iron oxide on Cu(001) at elevated temperature
journal, November 1999


In situ XPS analysis of various iron oxide films grown by NO 2 -assisted molecular-beam epitaxy
journal, January 1999


Heteroepitaxial growth of α-Fe2O3, γ-Fe2O3 and Fe3O4 thin films by oxygen-plasma-assisted molecular beam epitaxy
journal, April 1997


Atomic-oxygen-assisted MBE growth of α F e 2 O 3 on α A l 2 O 3 (0001): Metastable FeO(111)-like phase at subnanometer thicknesses
journal, November 1999


Oxygen pressure and thickness dependent lattice strain in La[sub 0.7]Sr[sub 0.3]MnO[sub 3] films
journal, January 2003

  • Dho, Joonghoe; Hur, N. H.; Kim, I. S.
  • Journal of Applied Physics, Vol. 94, Issue 12
  • DOI: 10.1063/1.1628831

Effect of low-level titanium(IV) doping on the resistivity of magnetite near the Verwey transition
journal, July 1992


An STM study of Fe3O4(100) grown by molecular beam epitaxy
journal, February 1997


From epitaxial growth of ferrite thin films to spin-polarized tunnelling
journal, March 2013


Origin of metal–insulator transition temperature enhancement in underdoped lanthanum manganite films
journal, March 2003

  • Murugavel, P.; Lee, J. H.; Yoon, Jong-Gul
  • Applied Physics Letters, Vol. 82, Issue 12
  • DOI: 10.1063/1.1563740

Synthesis of epitaxial films of Fe3O4 and α-Fe2O3 with various low-index orientations by oxygen-plasma-assisted molecular beam epitaxy
journal, March 1997

  • Gao, Y.; Kim, Y. J.; Chambers, S. A.
  • Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, Vol. 15, Issue 2
  • DOI: 10.1116/1.580488

Material characteristics of perovskite manganese oxide thin films for bolometric applications
journal, October 1997

  • Goyal, A.; Rajeswari, M.; Shreekala, R.
  • Applied Physics Letters, Vol. 71, Issue 17
  • DOI: 10.1063/1.120427

Magnetic and transport properties of epitaxial Fe 3 O 4 films grown at different oxygen pressure
journal, June 2015


Origin of the giant magnetic moment in epitaxial Fe 3 O 4 thin films
journal, April 2010


Epitaxial growth of iron oxide films on Ag(111)
journal, January 2005


Impurity effects upon the Verwey transition in magnetite
journal, December 1998


Growth And Structure Of Nanometric Iron Oxide Films
journal, January 1998


X-Ray Diffraction Study on the Low Temperature Phase of Magnetite
journal, January 1977

  • Yoshida, Jiro; Iida, Shuichi
  • Journal of the Physical Society of Japan, Vol. 42, Issue 1
  • DOI: 10.1143/jpsj.42.230

Stoichiometry, percolation, and Verwey ordering in magnetite
journal, March 1993


Structural properties of epitaxial nanometric iron oxide layers on α-Al2O3(0001): an in situ RHEED study during growth
journal, May 2000


Growth of iron oxides on Ag(111) — Reversible Fe2O3/Fe3O4 transformation
journal, December 2011


Verwey transition in Fe 3 O 4 thin films: Influence of oxygen stoichiometry and substrate-induced microstructure
journal, September 2014


X-ray diffraction study on size effects in epitaxial magnetite thin films on MgO(0 0 1)
journal, September 2012


Influence of nonstoichiometry on the Verwey transition
journal, January 1985

  • Aragón, Ricardo; Buttrey, Douglas J.; Shepherd, John P.
  • Physical Review B, Vol. 31, Issue 1
  • DOI: 10.1103/physrevb.31.430

Observation of the Verwey transition in thin magnetite films
journal, June 2005

  • Chapline, Michael G.; Wang, Shan X.
  • Journal of Applied Physics, Vol. 97, Issue 12
  • DOI: 10.1063/1.1929092

Electronic Conduction of Magnetite (Fe3O4) and its Transition Point at Low Temperatures
journal, August 1939


Verwey transition in Fe 3 O 4 thin films: Influence of oxygen stoichiometry and substrate-induced microstructure
journal, September 2014


Origin of the giant magnetic moment in epitaxial Fe 3 O 4 thin films
journal, April 2010


X-Ray Diffraction Study on the Low Temperature Phase of Magnetite
journal, January 1977

  • Yoshida, Jiro; Iida, Shuichi
  • Journal of the Physical Society of Japan, Vol. 42, Issue 1
  • DOI: 10.1143/JPSJ.42.230

Influence of nonstoichiometry on the Verwey transition
journal, January 1985

  • Aragón, Ricardo; Buttrey, Douglas J.; Shepherd, John P.
  • Physical Review B, Vol. 31, Issue 1
  • DOI: 10.1103/PhysRevB.31.430

Effect of low-level titanium(IV) doping on the resistivity of magnetite near the Verwey transition
journal, July 1992


Stoichiometry, percolation, and Verwey ordering in magnetite
journal, March 1993


Impurity effects upon the Verwey transition in magnetite
journal, December 1998


Preparation and characterization of epitaxial iron oxide films
journal, July 1998

  • Gao, Y.; Kim, Y. J.; Chambers, S. A.
  • Journal of Materials Research, Vol. 13, Issue 7
  • DOI: 10.1557/JMR.1998.0281

An STM study of Fe3O4(100) grown by molecular beam epitaxy
journal, February 1997


Growth And Structure Of Nanometric Iron Oxide Films
journal, January 1998


Atomic-oxygen-assisted MBE growth of α F e 2 O 3 on α A l 2 O 3 (0001): Metastable FeO(111)-like phase at subnanometer thicknesses
journal, November 1999


Structural properties of epitaxial nanometric iron oxide layers on α-Al2O3(0001): an in situ RHEED study during growth
journal, May 2000


Heteroepitaxial growth of α-Fe2O3, γ-Fe2O3 and Fe3O4 thin films by oxygen-plasma-assisted molecular beam epitaxy
journal, April 1997


In situ XPS analysis of various iron oxide films grown by NO 2 -assisted molecular-beam epitaxy
journal, January 1999


Growth of iron oxide on Cu(001) at elevated temperature
journal, November 1999


    Works referencing / citing this record:

    Evolution of magnetic properties in the vicinity of the Verwey transition in Fe 3 O 4 thin films
    journal, September 2017