Correlation of electronic and magnetic properties of thin polymer layers with cobalt nanoparticles

A. Kharchenko, M. Lukashevich, Vladimir Popok, R. Khaibullin, V. Valeev, V. Bazarov, O. Petracic, A. Wieck, Vladimir Odzhaev

    Research output: Contribution to journalJournal articleResearchpeer-review

    1 Citation (Scopus)

    Abstract

    Nanoparticles (NPs) of cobalt are synthesized in shallow layers of polyimide using 40 keV implantation of Co+ ions with a few different fluences at various ion current densities. Nucleation of individual NPs at low fluencies and their percolation at high fluencies are crucial processes governing the electrical and magnetic properties of the metal/polymer nanocomposites which can be controlled by the implantation regimes. In particular, one can tune the magnetoresistance between negative and positive through appropriate choice of ion fluence and current density. Found non-monotonous dependence of the magnetoresistance on the applied magnetic field allows to suggest spin-dependent domain wall scattering affecting the electron transport. The samples implanted with low fluencies demonstrate superparamagnetic behavior down to very low blocking temperatures. While for high fluence (1.25x1017 cm-2) the transition to ferromagnetic ordering is observed that is related to the increased magnetic interaction of NPs.
    Original languageEnglish
    JournalParticle & Particle Systems Characterization
    Volume30
    Issue number2
    Pages (from-to)180-184
    Number of pages5
    ISSN0934-0866
    DOIs
    Publication statusPublished - Feb 2013

    Fingerprint

    Cobalt
    Electronic properties
    Magnetic properties
    Polymers
    fluence
    cobalt
    Magnetoresistance
    Ions
    Nanoparticles
    magnetic properties
    nanoparticles
    implantation
    polymers
    Current density
    electronics
    current density
    Domain walls
    polyimides
    Polyimides
    Ion implantation

    Keywords

    • Metal Nanoparticles
    • Polymers
    • Magnetic Properties
    • Electrical Properties

    Cite this

    Kharchenko, A. ; Lukashevich, M. ; Popok, Vladimir ; Khaibullin, R. ; Valeev, V. ; Bazarov, V. ; Petracic, O. ; Wieck, A. ; Odzhaev, Vladimir. / Correlation of electronic and magnetic properties of thin polymer layers with cobalt nanoparticles. In: Particle & Particle Systems Characterization. 2013 ; Vol. 30, No. 2. pp. 180-184.
    @article{c3e687dbad8b4c2ca6c3f3a2b9024644,
    title = "Correlation of electronic and magnetic properties of thin polymer layers with cobalt nanoparticles",
    abstract = "Nanoparticles (NPs) of cobalt are synthesized in shallow layers of polyimide using 40 keV implantation of Co+ ions with a few different fluences at various ion current densities. Nucleation of individual NPs at low fluencies and their percolation at high fluencies are crucial processes governing the electrical and magnetic properties of the metal/polymer nanocomposites which can be controlled by the implantation regimes. In particular, one can tune the magnetoresistance between negative and positive through appropriate choice of ion fluence and current density. Found non-monotonous dependence of the magnetoresistance on the applied magnetic field allows to suggest spin-dependent domain wall scattering affecting the electron transport. The samples implanted with low fluencies demonstrate superparamagnetic behavior down to very low blocking temperatures. While for high fluence (1.25x1017 cm-2) the transition to ferromagnetic ordering is observed that is related to the increased magnetic interaction of NPs.",
    keywords = "Metal Nanoparticles, Polymers, Magnetic Properties, Electrical Properties",
    author = "A. Kharchenko and M. Lukashevich and Vladimir Popok and R. Khaibullin and V. Valeev and V. Bazarov and O. Petracic and A. Wieck and Vladimir Odzhaev",
    year = "2013",
    month = "2",
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    Kharchenko, A, Lukashevich, M, Popok, V, Khaibullin, R, Valeev, V, Bazarov, V, Petracic, O, Wieck, A & Odzhaev, V 2013, 'Correlation of electronic and magnetic properties of thin polymer layers with cobalt nanoparticles', Particle & Particle Systems Characterization, vol. 30, no. 2, pp. 180-184. https://doi.org/10.1002/ppsc.201200042

    Correlation of electronic and magnetic properties of thin polymer layers with cobalt nanoparticles. / Kharchenko, A.; Lukashevich, M.; Popok, Vladimir; Khaibullin, R.; Valeev, V.; Bazarov, V.; Petracic, O.; Wieck, A.; Odzhaev, Vladimir.

    In: Particle & Particle Systems Characterization, Vol. 30, No. 2, 02.2013, p. 180-184.

    Research output: Contribution to journalJournal articleResearchpeer-review

    TY - JOUR

    T1 - Correlation of electronic and magnetic properties of thin polymer layers with cobalt nanoparticles

    AU - Kharchenko, A.

    AU - Lukashevich, M.

    AU - Popok, Vladimir

    AU - Khaibullin, R.

    AU - Valeev, V.

    AU - Bazarov, V.

    AU - Petracic, O.

    AU - Wieck, A.

    AU - Odzhaev, Vladimir

    PY - 2013/2

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    N2 - Nanoparticles (NPs) of cobalt are synthesized in shallow layers of polyimide using 40 keV implantation of Co+ ions with a few different fluences at various ion current densities. Nucleation of individual NPs at low fluencies and their percolation at high fluencies are crucial processes governing the electrical and magnetic properties of the metal/polymer nanocomposites which can be controlled by the implantation regimes. In particular, one can tune the magnetoresistance between negative and positive through appropriate choice of ion fluence and current density. Found non-monotonous dependence of the magnetoresistance on the applied magnetic field allows to suggest spin-dependent domain wall scattering affecting the electron transport. The samples implanted with low fluencies demonstrate superparamagnetic behavior down to very low blocking temperatures. While for high fluence (1.25x1017 cm-2) the transition to ferromagnetic ordering is observed that is related to the increased magnetic interaction of NPs.

    AB - Nanoparticles (NPs) of cobalt are synthesized in shallow layers of polyimide using 40 keV implantation of Co+ ions with a few different fluences at various ion current densities. Nucleation of individual NPs at low fluencies and their percolation at high fluencies are crucial processes governing the electrical and magnetic properties of the metal/polymer nanocomposites which can be controlled by the implantation regimes. In particular, one can tune the magnetoresistance between negative and positive through appropriate choice of ion fluence and current density. Found non-monotonous dependence of the magnetoresistance on the applied magnetic field allows to suggest spin-dependent domain wall scattering affecting the electron transport. The samples implanted with low fluencies demonstrate superparamagnetic behavior down to very low blocking temperatures. While for high fluence (1.25x1017 cm-2) the transition to ferromagnetic ordering is observed that is related to the increased magnetic interaction of NPs.

    KW - Metal Nanoparticles

    KW - Polymers

    KW - Magnetic Properties

    KW - Electrical Properties

    U2 - 10.1002/ppsc.201200042

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