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

Abstract

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.

Authors:
 [1];  [2];  [3]; ORCiD logo [4];  [3]
  1. Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Ave., Argonne, Illinois 60439, USA
  2. Materials Science Division, Argonne National Laboratory, 9700 S. Cass Ave., Argonne, Illinois 60439, USA
  3. Department of Physics, University of Illinois, 1110 West Green Street, Urbana, Illinois 61801, USA
  4. Materials Science Division, Argonne National Laboratory, 9700 S. Cass Ave., Argonne, Illinois 60439, USA; Department of Materials Science and Engineering, KAIST, Daejeon 34141, South Korea
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division
OSTI Identifier:
1395890
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 110; Journal Issue: 2
Country of Publication:
United States
Language:
English

Citation Formats

Hong, Hawoong, Kim, Jongjin, Fang, Xinyue, Hong, Seungbum, and Chiang, T. -C. Interfacial stability of ultrathin films of magnetite Fe3O4 (111) on Al2O3(001) grown by ozone-assisted molecular-beam epitaxy. United States: N. p., 2017. Web. doi:10.1063/1.4973808.
Hong, Hawoong, Kim, Jongjin, Fang, Xinyue, Hong, Seungbum, & Chiang, T. -C. Interfacial stability of ultrathin films of magnetite Fe3O4 (111) on Al2O3(001) grown by ozone-assisted molecular-beam epitaxy. United States. doi:10.1063/1.4973808.
Hong, Hawoong, Kim, Jongjin, Fang, Xinyue, Hong, Seungbum, and Chiang, T. -C. Mon . "Interfacial stability of ultrathin films of magnetite Fe3O4 (111) on Al2O3(001) grown by ozone-assisted molecular-beam epitaxy". United States. doi:10.1063/1.4973808.
@article{osti_1395890,
title = {Interfacial stability of ultrathin films of magnetite Fe3O4 (111) on Al2O3(001) grown by ozone-assisted molecular-beam epitaxy},
author = {Hong, Hawoong and Kim, Jongjin and Fang, Xinyue and Hong, Seungbum and Chiang, T. -C.},
abstractNote = {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.},
doi = {10.1063/1.4973808},
journal = {Applied Physics Letters},
number = 2,
volume = 110,
place = {United States},
year = {Mon Jan 09 00:00:00 EST 2017},
month = {Mon Jan 09 00:00:00 EST 2017}
}