Pulsed laser deposition films from a Ba2FeMoO6 target onto SrTiO3[001]: Chemical and magnetic inhomogeneity

Pajerowski, Daniel M.; Krayer, Lisa J.; Kirby, Brian J.; Maranville, Brian B.; Borchers, Julie A.; Kim, Kyeong-Won; Norton, David P.

doi:10.1063/1.5039401

Title: Pulsed laser deposition films from a Ba₂FeMoO₆ target onto SrTiO₃[001]: Chemical and magnetic inhomogeneity

Journal Article · 21 October 2018 · Journal of Applied Physics

DOI: https://doi.org/10.1063/1.5039401 · OSTI ID:1479740

^[1];

^[2]; Kirby, Brian J. ^[2];

^[2]; Borchers, Julie A. ^[2]; Kim, Kyeong-Won ^[3]; Norton, David P. ^[3]

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
National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). NIST Center for Neutron Research
Univ. of Florida, Gainesville, FL (United States). Dept. of Materials Science and Engineering

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.

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Research Organization:: National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: National Inst. of Standards and Technology (NIST) (United States); National Science Foundation (NSF) (United States); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1479740

Journal Information:: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 16 Vol. 124; ISSN 0021-8979

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

Country of Publication:: United States

Language:: English

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Title: Pulsed laser deposition films from a Ba2FeMoO6 target onto SrTiO3[001]: Chemical and magnetic inhomogeneity

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Title: Pulsed laser deposition films from a Ba₂FeMoO₆ target onto SrTiO₃[001]: Chemical and magnetic inhomogeneity