Interfacial stability of ultrathin films of magnetite Fe3O4 (111) on Al2O3(001) grown by ozone-assisted molecular-beam epitaxy

Hong, Hawoong; Kim, Jongjin; Fang, Xinyue; Hong, Seungbum; Chiang, T. -C.

doi:10.1063/1.4973808

Title: Interfacial stability of ultrathin films of magnetite Fe₃O₄ (111) on Al₂O₃(001) grown by ozone-assisted molecular-beam epitaxy

Journal Article · Mon Jan 09 00:00:00 EST 2017 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4973808· OSTI ID:1395890

Hong, Hawoong ^[1]; Kim, Jongjin ^[1]; Fang, Xinyue ^[2];

^[3]; Chiang, T. -C. ^[2]

Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Univ. of Illinois at Urbana-Champaign, IL (United States)
National Univ. in Daejeon (KAIST) (South Korea) Dept. of Materials Science and Engineering; Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division

Thin films of iron oxides including magnetite (Fe₃O₄) and hematite (α-Fe₂O₃) have many important applications. Both forms of oxide can occur naturally during film growth by iron deposition under various oxidation environment; an important issue is to understand and control the process resulting in a single-phase film. We have performed in-situ real-time studies using x-ray diffraction of such film growth on sapphire (001) under pure ozone by monitoring the (00L) rod. Stable magnetite growth can be maintained at growth temperatures below 600° C up to a certain critical film thickness, beyond which the growth becomes hematite. The results demonstrate the importance of interfacial interaction in stabilizing the magnetite phase.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division

Grant/Contract Number:: AC02- 06CH11357; FG02-07ER46383

OSTI ID:: 1395890

Alternate ID(s):: OSTI ID: 1361731

Journal Information:: Applied Physics Letters, Vol. 110, Issue 2; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 8 works

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Cited By (1)

Dual Lewis site creation for activation of methanol on Fe ₃ O ₄ (111) thin films Xu, Fang; Chen, Wei; Walenta, Constantin A. Chemical Science, Vol. 11, Issue 9 https://doi.org/10.1039/c9sc06149e	journal	January 2020

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Title: Interfacial stability of ultrathin films of magnetite Fe3O4 (111) on Al2O3(001) grown by ozone-assisted molecular-beam epitaxy

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References (17)

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Title: Interfacial stability of ultrathin films of magnetite Fe₃O₄ (111) on Al₂O₃(001) grown by ozone-assisted molecular-beam epitaxy