The (001) Surface of Fe3O4 grown epitaxially on MgO and characterized by scanning tunneling microscopy

J. M. Gaines; J. T. Kohlhepp; J.T.W.M. van Eemeren; R.J.G. Elfrink; F. Roozeboom; W.J.M. de Jonge

doi:10.1557/PROC-474-191

The (001) Surface of Fe₃O₄ grown epitaxially on MgO and characterized by scanning tunneling microscopy

J. M. Gaines, J. T. Kohlhepp, J.T.W.M. van Eemeren, R.J.G. Elfrink, F. Roozeboom, W.J.M. de Jonge

Applied Physics and Science Education

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

14 Citations (Scopus)

Abstract

Spinel Fe₃O₄ contains two sites for iron: tetrahedrally coordinated sites containing Fe³⁺ ions and octahedrally coordinated sites containing a mixture of Fe²⁺ and Fe³⁺ ions. Scanning tunneling microscopy performed on the (001) surface of Fe₃O₄, grown epitaxially on MgO, shows localized charge density at the tetrahedral sites. The images show that the p(1×1) surface reconstruction (also observed during molecular beam epitaxy of Fe₃O₄) is produced by a displacement of the two tetrahedrally coordinated Fe ions on the unit cell surface from their bulk positions toward each other. The octahedral Fe ions are imaged as extended rows of charge density, with no resolution of atom-size features along the rows. This slight corrugation of electron charge density along the octahedral sites is consistent with the original conjectures explaining the high electrical conductivity in bulk Fe₃O₄: electrons move by hopping between the Fe³⁺ and Fe²⁺ atoms along the octahedral rows of Fe ions.

Original language	English
Title of host publication	Epitaxial oxide thin films : symposium, 3rd, March 31 - April 2, 1997, San Francisco, California, USA
Editors	D.G. Schlomm
Place of Publication	Warrendale
Publisher	Materials Research Society
Pages	191-198
Number of pages	8
ISBN (Print)	1-55899-378-9
DOIs	https://doi.org/10.1557/PROC-474-191
Publication status	Published - 1 Dec 1997
Event	1997 MRS Spring Meeting & Exhibit - San Francisco, United States Duration: 31 Mar 1997 → 4 Apr 1997 https://www.mrs.org/spring1997 http://www.mrs.org/s97-program-l/

Publication series

Name	Materials Research Society Symposium - Proceedings
Volume	474
ISSN (Print)	0272-9172

Conference

Conference	1997 MRS Spring Meeting & Exhibit
Country/Territory	United States
City	San Francisco
Period	31/03/97 → 4/04/97
Other
Internet address	https://www.mrs.org/spring1997 http://www.mrs.org/s97-program-l/

Access to Document

10.1557/PROC-474-191

Cite this

Gaines, J. M., Kohlhepp, J. T., van Eemeren, J. T. W. M., Elfrink, R. J. G., Roozeboom, F., & de Jonge, W. J. M. (1997). The (001) Surface of Fe₃O₄ grown epitaxially on MgO and characterized by scanning tunneling microscopy. In D. G. Schlomm (Ed.), Epitaxial oxide thin films : symposium, 3rd, March 31 - April 2, 1997, San Francisco, California, USA (pp. 191-198). (Materials Research Society Symposium - Proceedings; Vol. 474). Materials Research Society. https://doi.org/10.1557/PROC-474-191

Gaines, J. M. ; Kohlhepp, J. T. ; van Eemeren, J.T.W.M. et al. / The (001) Surface of Fe₃O₄ grown epitaxially on MgO and characterized by scanning tunneling microscopy. Epitaxial oxide thin films : symposium, 3rd, March 31 - April 2, 1997, San Francisco, California, USA . editor / D.G. Schlomm. Warrendale : Materials Research Society, 1997. pp. 191-198 (Materials Research Society Symposium - Proceedings).

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title = "The (001) Surface of Fe3O4 grown epitaxially on MgO and characterized by scanning tunneling microscopy",

abstract = "Spinel Fe3O4 contains two sites for iron: tetrahedrally coordinated sites containing Fe3+ ions and octahedrally coordinated sites containing a mixture of Fe2+ and Fe3+ ions. Scanning tunneling microscopy performed on the (001) surface of Fe3O4, grown epitaxially on MgO, shows localized charge density at the tetrahedral sites. The images show that the p(1×1) surface reconstruction (also observed during molecular beam epitaxy of Fe3O4) is produced by a displacement of the two tetrahedrally coordinated Fe ions on the unit cell surface from their bulk positions toward each other. The octahedral Fe ions are imaged as extended rows of charge density, with no resolution of atom-size features along the rows. This slight corrugation of electron charge density along the octahedral sites is consistent with the original conjectures explaining the high electrical conductivity in bulk Fe3O4: electrons move by hopping between the Fe3+ and Fe2+ atoms along the octahedral rows of Fe ions.",

author = "Gaines, {J. M.} and Kohlhepp, {J. T.} and {van Eemeren}, J.T.W.M. and R.J.G. Elfrink and F. Roozeboom and {de Jonge}, W.J.M.",

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Gaines, JM, Kohlhepp, JT, van Eemeren, JTWM, Elfrink, RJG, Roozeboom, F & de Jonge, WJM 1997, The (001) Surface of Fe₃O₄ grown epitaxially on MgO and characterized by scanning tunneling microscopy. in DG Schlomm (ed.), Epitaxial oxide thin films : symposium, 3rd, March 31 - April 2, 1997, San Francisco, California, USA . Materials Research Society Symposium - Proceedings, vol. 474, Materials Research Society, Warrendale, pp. 191-198, 1997 MRS Spring Meeting & Exhibit, San Francisco, California, United States, 31/03/97. https://doi.org/10.1557/PROC-474-191

The (001) Surface of Fe₃O₄ grown epitaxially on MgO and characterized by scanning tunneling microscopy. / Gaines, J. M.; Kohlhepp, J. T.; van Eemeren, J.T.W.M. et al.
Epitaxial oxide thin films : symposium, 3rd, March 31 - April 2, 1997, San Francisco, California, USA . ed. / D.G. Schlomm. Warrendale: Materials Research Society, 1997. p. 191-198 (Materials Research Society Symposium - Proceedings; Vol. 474).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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N2 - Spinel Fe3O4 contains two sites for iron: tetrahedrally coordinated sites containing Fe3+ ions and octahedrally coordinated sites containing a mixture of Fe2+ and Fe3+ ions. Scanning tunneling microscopy performed on the (001) surface of Fe3O4, grown epitaxially on MgO, shows localized charge density at the tetrahedral sites. The images show that the p(1×1) surface reconstruction (also observed during molecular beam epitaxy of Fe3O4) is produced by a displacement of the two tetrahedrally coordinated Fe ions on the unit cell surface from their bulk positions toward each other. The octahedral Fe ions are imaged as extended rows of charge density, with no resolution of atom-size features along the rows. This slight corrugation of electron charge density along the octahedral sites is consistent with the original conjectures explaining the high electrical conductivity in bulk Fe3O4: electrons move by hopping between the Fe3+ and Fe2+ atoms along the octahedral rows of Fe ions.

AB - Spinel Fe3O4 contains two sites for iron: tetrahedrally coordinated sites containing Fe3+ ions and octahedrally coordinated sites containing a mixture of Fe2+ and Fe3+ ions. Scanning tunneling microscopy performed on the (001) surface of Fe3O4, grown epitaxially on MgO, shows localized charge density at the tetrahedral sites. The images show that the p(1×1) surface reconstruction (also observed during molecular beam epitaxy of Fe3O4) is produced by a displacement of the two tetrahedrally coordinated Fe ions on the unit cell surface from their bulk positions toward each other. The octahedral Fe ions are imaged as extended rows of charge density, with no resolution of atom-size features along the rows. This slight corrugation of electron charge density along the octahedral sites is consistent with the original conjectures explaining the high electrical conductivity in bulk Fe3O4: electrons move by hopping between the Fe3+ and Fe2+ atoms along the octahedral rows of Fe ions.

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BT - Epitaxial oxide thin films : symposium, 3rd, March 31 - April 2, 1997, San Francisco, California, USA

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Gaines JM, Kohlhepp JT, van Eemeren JTWM, Elfrink RJG, Roozeboom F, de Jonge WJM. The (001) Surface of Fe₃O₄ grown epitaxially on MgO and characterized by scanning tunneling microscopy. In Schlomm DG, editor, Epitaxial oxide thin films : symposium, 3rd, March 31 - April 2, 1997, San Francisco, California, USA . Warrendale: Materials Research Society. 1997. p. 191-198. (Materials Research Society Symposium - Proceedings). doi: 10.1557/PROC-474-191