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Title: Pulsed laser deposition films from a Ba 2FeMoO 6 target onto SrTiO 3[001]: Chemical and magnetic inhomogeneity

Abstract

Pulsed laser deposition films from Ba 2FeMoO 6 (BFMO) targets onto SrTiO 3[001] (STO) substrates have been reported previously to have non-zero magnetism at 300 K, a majority of magnetic ordering at 240 K that is less than the 370 K ordering temperature of polycrystalline BFMO, and suppressed saturation magnetization compared to polycrystalline BFMO. To interrogate these previously reported observations of BFMO on STO, here we have used a combination of x-ray diffraction, atomic force microscopy, x-ray and neutron reflectivity, and x-ray photoelectron spectroscopy that shows inhomogeneities. The present results show off-stoichiometry on the A-site by incorporation of Sr from the substrate and on the B-site to have %Fe/%Mo > 1 by evolution of BaMoO 4. There is an enhanced ordering temperature and magnetic response nearer to the SrTiO 3 interface compared to the air interface. Depth dependent strain and microstructure are needed to explain the magnetic response. Finally, holistic considerations and implications are also discussed.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [2]; ORCiD logo [2];  [2];  [3];  [3]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Scattering Division; National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). NIST Center for Neutron Research
  2. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). NIST Center for Neutron Research
  3. Univ. of Florida, Gainesville, FL (United States). Dept. of Materials Science and Engineering
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Inst. of Standards and Technology (NIST) (United States); National Science Foundation (NSF)
OSTI Identifier:
1479740
Grant/Contract Number:  
AC05-00OR22725; DMR-0944772
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 124; Journal Issue: 16; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; neutron reflectometry; atomic force microscopy; depth profiling techniques; crystal lattices; transition metals; x-ray diffraction; x-ray photoelectron spectroscopy; perovskites; pulsed laser deposition

Citation Formats

Pajerowski, Daniel M., Krayer, Lisa J., Kirby, Brian J., Maranville, Brian B., Borchers, Julie A., Kim, Kyeong-Won, and Norton, David P. Pulsed laser deposition films from a Ba2FeMoO6 target onto SrTiO3[001]: Chemical and magnetic inhomogeneity. United States: N. p., 2018. Web. doi:10.1063/1.5039401.
Pajerowski, Daniel M., Krayer, Lisa J., Kirby, Brian J., Maranville, Brian B., Borchers, Julie A., Kim, Kyeong-Won, & Norton, David P. Pulsed laser deposition films from a Ba2FeMoO6 target onto SrTiO3[001]: Chemical and magnetic inhomogeneity. United States. doi:10.1063/1.5039401.
Pajerowski, Daniel M., Krayer, Lisa J., Kirby, Brian J., Maranville, Brian B., Borchers, Julie A., Kim, Kyeong-Won, and Norton, David P. Mon . "Pulsed laser deposition films from a Ba2FeMoO6 target onto SrTiO3[001]: Chemical and magnetic inhomogeneity". United States. doi:10.1063/1.5039401.
@article{osti_1479740,
title = {Pulsed laser deposition films from a Ba2FeMoO6 target onto SrTiO3[001]: Chemical and magnetic inhomogeneity},
author = {Pajerowski, Daniel M. and Krayer, Lisa J. and Kirby, Brian J. and Maranville, Brian B. and Borchers, Julie A. and Kim, Kyeong-Won and Norton, David P.},
abstractNote = {Pulsed laser deposition films from Ba2FeMoO6 (BFMO) targets onto SrTiO3[001] (STO) substrates have been reported previously to have non-zero magnetism at 300 K, a majority of magnetic ordering at 240 K that is less than the 370 K ordering temperature of polycrystalline BFMO, and suppressed saturation magnetization compared to polycrystalline BFMO. To interrogate these previously reported observations of BFMO on STO, here we have used a combination of x-ray diffraction, atomic force microscopy, x-ray and neutron reflectivity, and x-ray photoelectron spectroscopy that shows inhomogeneities. The present results show off-stoichiometry on the A-site by incorporation of Sr from the substrate and on the B-site to have %Fe/%Mo > 1 by evolution of BaMoO4. There is an enhanced ordering temperature and magnetic response nearer to the SrTiO3 interface compared to the air interface. Depth dependent strain and microstructure are needed to explain the magnetic response. Finally, holistic considerations and implications are also discussed.},
doi = {10.1063/1.5039401},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 16,
volume = 124,
place = {United States},
year = {2018},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on October 22, 2019
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