Properties of iron oxide films grown by pulsed laser deposition

H. S. Choi; J. S. Ahn; William Jo; T. W. Noh; S. H. Chun; Z. G. Khim

doi:10.1557/proc-341-35

Properties of iron oxide films grown by pulsed laser deposition

H. S. Choi, J. S. Ahn, William Jo, T. W. Noh, S. H. Chun, Z. G. Khim

Department of Physics

Research output: Contribution to journal › Conference article › peer-review

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Abstract

Epitaxial magnetite (Fe₃O₄) thin films have been grown on MgO(001) substrates by pulsed laser deposition. The films have characteristics of the `Verwey transition': the electric conductivity decreases by about one order of magnitude and the magnetization curve shows anomaly at the transition temperature, i.e. about 125 K. Effects of annealing the Fe₃O₄ thin films at various oxygen partial pressures have also been investigated. Phase identification was made using XRD techniques and infrared reflectivity measurements. The surface morphologies were studied by SEM and AFM. Under an oxidizing atmosphere, the Fe₃O₄ phase is transformed mainly into α-Fe₂O₃, and this transformation is accompanied by development of needle-like structures along 〈110〉 directions of MgO substrate. It is also found that electrical and magnetic properties of the iron oxide films are changed significantly by the annealing process.

Original language	English
Pages (from-to)	35-40
Number of pages	6
Journal	Materials Research Society Symposium - Proceedings
Volume	341
DOIs	https://doi.org/10.1557/proc-341-35
State	Published - 1994
Event	Proceedings of the 1994 MRS Spring Meeting - San Francisco, CA, USA Duration: 5 Apr 1994 → 7 Apr 1994

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@article{347aca46a7db4208bcf0375f68906ed1,

title = "Properties of iron oxide films grown by pulsed laser deposition",

abstract = "Epitaxial magnetite (Fe3O4) thin films have been grown on MgO(001) substrates by pulsed laser deposition. The films have characteristics of the `Verwey transition': the electric conductivity decreases by about one order of magnitude and the magnetization curve shows anomaly at the transition temperature, i.e. about 125 K. Effects of annealing the Fe3O4 thin films at various oxygen partial pressures have also been investigated. Phase identification was made using XRD techniques and infrared reflectivity measurements. The surface morphologies were studied by SEM and AFM. Under an oxidizing atmosphere, the Fe3O4 phase is transformed mainly into α-Fe2O3, and this transformation is accompanied by development of needle-like structures along 〈110〉 directions of MgO substrate. It is also found that electrical and magnetic properties of the iron oxide films are changed significantly by the annealing process.",

author = "Choi, {H. S.} and Ahn, {J. S.} and William Jo and Noh, {T. W.} and Chun, {S. H.} and Khim, {Z. G.}",

year = "1994",

doi = "10.1557/proc-341-35",

language = "English",

volume = "341",

pages = "35--40",

journal = "Materials Research Society Symposium - Proceedings",

issn = "0272-9172",

publisher = "Materials Research Society",

note = "Proceedings of the 1994 MRS Spring Meeting ; Conference date: 05-04-1994 Through 07-04-1994",

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TY - JOUR

T1 - Properties of iron oxide films grown by pulsed laser deposition

AU - Choi, H. S.

AU - Ahn, J. S.

AU - Jo, William

AU - Noh, T. W.

AU - Chun, S. H.

AU - Khim, Z. G.

PY - 1994

Y1 - 1994

N2 - Epitaxial magnetite (Fe3O4) thin films have been grown on MgO(001) substrates by pulsed laser deposition. The films have characteristics of the `Verwey transition': the electric conductivity decreases by about one order of magnitude and the magnetization curve shows anomaly at the transition temperature, i.e. about 125 K. Effects of annealing the Fe3O4 thin films at various oxygen partial pressures have also been investigated. Phase identification was made using XRD techniques and infrared reflectivity measurements. The surface morphologies were studied by SEM and AFM. Under an oxidizing atmosphere, the Fe3O4 phase is transformed mainly into α-Fe2O3, and this transformation is accompanied by development of needle-like structures along 〈110〉 directions of MgO substrate. It is also found that electrical and magnetic properties of the iron oxide films are changed significantly by the annealing process.

AB - Epitaxial magnetite (Fe3O4) thin films have been grown on MgO(001) substrates by pulsed laser deposition. The films have characteristics of the `Verwey transition': the electric conductivity decreases by about one order of magnitude and the magnetization curve shows anomaly at the transition temperature, i.e. about 125 K. Effects of annealing the Fe3O4 thin films at various oxygen partial pressures have also been investigated. Phase identification was made using XRD techniques and infrared reflectivity measurements. The surface morphologies were studied by SEM and AFM. Under an oxidizing atmosphere, the Fe3O4 phase is transformed mainly into α-Fe2O3, and this transformation is accompanied by development of needle-like structures along 〈110〉 directions of MgO substrate. It is also found that electrical and magnetic properties of the iron oxide films are changed significantly by the annealing process.

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U2 - 10.1557/proc-341-35

DO - 10.1557/proc-341-35

M3 - Conference article

AN - SCOPUS:0028570951

SN - 0272-9172

VL - 341

SP - 35

EP - 40

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

T2 - Proceedings of the 1994 MRS Spring Meeting

Y2 - 5 April 1994 through 7 April 1994

ER -

Properties of iron oxide films grown by pulsed laser deposition

Abstract

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