Exchange bias in polycrystalline magnetite films made by ion-beam assisted deposition

Kaur, Maninder; Jiang, Weilin; Qiang, You; Burks, Edward C.; Liu, Kai; Namavar, Fereydoon; McCloy, John S.

doi:10.1063/1.4900747

Title: Exchange bias in polycrystalline magnetite films made by ion-beam assisted deposition

Abstract

Iron oxide films were deposited onto Si substrates using ion-beam-assisted deposition. The films were ~300 nm thick polycrystalline magnetite with an average crystallite size of ~6 nm. Additionally, incorporation of significant fractions of argon in the films from ion bombardment is evident from chemical analysis, and Fe/O ratios are lower than expected from pure magnetite. However, Raman spectroscopy and x-ray diffraction both indicate that the films are single-phase magnetite. Since no direct evidence of a second phase could be found, exchange bias likely arises due to defects at grain boundaries, possibly amorphous, creating frustrated spins. Since these samples have such small grains, a large fraction of the material consists of grain boundaries, where spins are highly disordered and reverse independently with external field. Furthermore, the high energy deposition process results in an oxygen-rich, argon-containing magnetite film with low temperature exchange bias due to defects at the high concentration of grain boundaries.

Authors:

Kaur, Maninder ^[1]; Jiang, Weilin ^[2]; Qiang, You ^[1]; Burks, Edward C. ^[3];

^[3]; Namavar, Fereydoon ^[4];

^[5]

Univ. of Idaho, Moscow, ID (United States)
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Univ. of California, Davis, CA (United States)
Univ. of Nebraska Medical Center, Omaha, NE (United States)
Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Washington State Univ., Pullman, WA (United States)

Publication Date:: Mon Nov 03 00:00:00 EST 2014

Research Org.:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States). Environmental Molecular Sciences Laboratory (EMSL)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1166845

Alternate Identifier(s):: OSTI ID: 1420483

Report Number(s):: PNNL-SA-104251
Journal ID: ISSN 0021-8979; 44713

Grant/Contract Number:: AC05-76RL01830

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Applied Physics

Additional Journal Information:: Journal Volume: 116; Journal Issue: 17; Journal ID: ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; magnetite; IBAD; thin film; FORC; exchange bias; Environmental Molecular Sciences Laboratory

Citation Formats


                    Kaur, Maninder, Jiang, Weilin, Qiang, You, Burks, Edward C., Liu, Kai, Namavar, Fereydoon, and McCloy, John S. Exchange bias in polycrystalline magnetite films made by ion-beam assisted deposition.  United States: N. p., 2014. 
Web.  doi:10.1063/1.4900747.

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                    Kaur, Maninder, Jiang, Weilin, Qiang, You, Burks, Edward C., Liu, Kai, Namavar, Fereydoon, & McCloy, John S. Exchange bias in polycrystalline magnetite films made by ion-beam assisted deposition.  United States.  https://doi.org/10.1063/1.4900747

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                    Kaur, Maninder, Jiang, Weilin, Qiang, You, Burks, Edward C., Liu, Kai, Namavar, Fereydoon, and McCloy, John S. Mon .  
"Exchange bias in polycrystalline magnetite films made by ion-beam assisted deposition".  United States.  https://doi.org/10.1063/1.4900747.  https://www.osti.gov/servlets/purl/1166845.

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@article{osti_1166845,

  title        = {Exchange bias in polycrystalline magnetite films made by ion-beam assisted deposition},

  author       = {Kaur, Maninder and Jiang, Weilin and Qiang, You and Burks, Edward C. and Liu, Kai and Namavar, Fereydoon and McCloy, John S.},

  abstractNote = {Iron oxide films were deposited onto Si substrates using ion-beam-assisted deposition. The films were ~300 nm thick polycrystalline magnetite with an average crystallite size of ~6 nm. Additionally, incorporation of significant fractions of argon in the films from ion bombardment is evident from chemical analysis, and Fe/O ratios are lower than expected from pure magnetite. However, Raman spectroscopy and x-ray diffraction both indicate that the films are single-phase magnetite. Since no direct evidence of a second phase could be found, exchange bias likely arises due to defects at grain boundaries, possibly amorphous, creating frustrated spins. Since these samples have such small grains, a large fraction of the material consists of grain boundaries, where spins are highly disordered and reverse independently with external field. Furthermore, the high energy deposition process results in an oxygen-rich, argon-containing magnetite film with low temperature exchange bias due to defects at the high concentration of grain boundaries.},

  doi          = {10.1063/1.4900747},

  journal      = {Journal of Applied Physics},

  number       = 17,

  volume       = 116,

  place        = {United States},

  year         = {Mon Nov 03 00:00:00 EST 2014},

  month        = {Mon Nov 03 00:00:00 EST 2014}

}

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Magnetization reversal and nanoscopic magnetic-phase separation in ${La}_{1 - x} {Sr}_{x} {CoO}_{3}$
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Works referencing / citing this record:

Microstructure, magnetic properties and the giant magnetoimpedance effect of amorphous CoSiB thin films deposited by different preparation methods
journal, October 2018

Wang, San-Sheng; Zhang, Yu; Jiao, Jing-Yong
Journal of Physics D: Applied Physics, Vol. 51, Issue 45
DOI: 10.1088/1361-6463/aae179

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Similar Records

Title: Exchange bias in polycrystalline magnetite films made by ion-beam assisted deposition

Abstract

Citation Formats

Exchange bias induced by O ion implantation in ferromagnetic thin films journal, September 2012

Lotus Effect in Engineered Zirconia journal, April 2008

Magnetization reversal of Co ∕ Pt multilayers: Microscopic origin of high-field magnetic irreversibility journal, December 2004

Memory Effect in Magnetic Nanowire Arrays journal, February 2011

Superparamagnetic behavior of structural domains in epitaxial ultrathin magnetite films journal, April 1998

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Observation of intriguing exchange bias in BiFeO 3 thin films journal, August 2012

Magnetic domain structures of La0.67Sr0.33MnO3 thin films with different morphologies journal, October 1997

Magnetotransport anisotropy effects in epitaxial magnetite ( Fe 3 O 4 ) thin films journal, April 1998

Nanocomposite , thin films prepared by RF sputtering and revealed by magnetic coupling effects journal, January 2008

Quantitative Decoding of Interactions in Tunable Nanomagnet Arrays Using First Order Reversal Curves journal, February 2014

Exchange bias in core-shell iron-iron oxide nanoclusters journal, May 2013

Magnetization reversal and nanoscopic magnetic-phase separation in La 1 − x Sr x CoO 3 journal, October 2005

Magnetization and susceptibility of ion-irradiated granular magnetite films journal, April 2011

Ion Beam Assisted Thin Film Deposition: book, January 1995

Low-temperature first-order reversal curve (FORC) diagrams for synthetic and natural samples: FORC DIAGRAMS journal, September 2006

Reduction in anti-ferromagnetic interactions in ion-beam deposited Fe 3 O 4 thin films journal, April 2012

Size Dependence of Inter- and Intracluster Interactions in Core–Shell Iron–Iron Oxide Nanoclusters journal, June 2012

Grain-boundary effects on the magnetoresistance properties of perovskite manganite films journal, December 1996

Accurate determination of the cell dimensions of magnetite journal, June 1957

Temperature induced single domain–vortex state transition in sub-100nm Fe nanodots journal, November 2007

Fluence dependence of ion implantation-induced exchange bias in face centered cubic Co thin films journal, December 2011

Probing antiphase boundaries in Fe3O4 thin films using micro-Raman spectroscopy journal, December 2008

Simultaneous enhancement of anisotropy and grain isolation in CoPtCr-SiO 2 perpendicular recording media by a MnRu intermediate layer journal, July 2010

Extrinsic magnetoresistance in magnetite nanoparticles journal, May 2003

Irreversibility of magnetization rotation in exchange biased Fe/epitaxial-FeF2 thin films journal, January 2007

Microstructure, magnetic properties and the giant magnetoimpedance effect of amorphous CoSiB thin films deposited by different preparation methods journal, October 2018

Exchange bias induced by O ion implantation in ferromagnetic thin films
journal, September 2012

Lotus Effect in Engineered Zirconia
journal, April 2008

Magnetization reversal of $Co ∕ Pt$ multilayers: Microscopic origin of high-field magnetic irreversibility
journal, December 2004

Memory Effect in Magnetic Nanowire Arrays
journal, February 2011

Superparamagnetic behavior of structural domains in epitaxial ultrathin magnetite films
journal, April 1998

Magnetic properties of half-metallic Fe3O4 films
journal, June 2004

Observation of intriguing exchange bias in BiFeO ₃ thin films
journal, August 2012

Magnetic domain structures of La0.67Sr0.33MnO3 thin films with different morphologies
journal, October 1997

Magnetotransport anisotropy effects in epitaxial magnetite $({Fe}_{3} O_{4})$ thin films
journal, April 1998

Nanocomposite , thin films prepared by RF sputtering and revealed by magnetic coupling effects
journal, January 2008

Quantitative Decoding of Interactions in Tunable Nanomagnet Arrays Using First Order Reversal Curves
journal, February 2014

Exchange bias in core-shell iron-iron oxide nanoclusters
journal, May 2013

Magnetization reversal and nanoscopic magnetic-phase separation in ${La}_{1 - x} {Sr}_{x} {CoO}_{3}$
journal, October 2005

Magnetization and susceptibility of ion-irradiated granular magnetite films
journal, April 2011

Ion Beam Assisted Thin Film Deposition:
book, January 1995

Low-temperature first-order reversal curve (FORC) diagrams for synthetic and natural samples: FORC DIAGRAMS
journal, September 2006

Reduction in anti-ferromagnetic interactions in ion-beam deposited Fe ₃ O ₄ thin films
journal, April 2012

Size Dependence of Inter- and Intracluster Interactions in Core–Shell Iron–Iron Oxide Nanoclusters
journal, June 2012

Grain-boundary effects on the magnetoresistance properties of perovskite manganite films
journal, December 1996

Accurate determination of the cell dimensions of magnetite
journal, June 1957

Temperature induced single domain–vortex state transition in sub-100nm Fe nanodots
journal, November 2007

Fluence dependence of ion implantation-induced exchange bias in face centered cubic Co thin films
journal, December 2011

Probing antiphase boundaries in Fe3O4 thin films using micro-Raman spectroscopy
journal, December 2008

Simultaneous enhancement of anisotropy and grain isolation in ${CoPtCr-SiO}_{2}$ perpendicular recording media by a MnRu intermediate layer
journal, July 2010

Extrinsic magnetoresistance in magnetite nanoparticles
journal, May 2003

Irreversibility of magnetization rotation in exchange biased Fe/epitaxial-FeF2 thin films
journal, January 2007

Microstructure, magnetic properties and the giant magnetoimpedance effect of amorphous CoSiB thin films deposited by different preparation methods
journal, October 2018