Hybridization-induced charge rebalancing at the weakly interactive C60/Fe3O4(001) spinterface

P.K.J. Wong, W. Zhang, Machiel Pieter de Jong

    Research output: Contribution to journalArticleAcademicpeer-review

    13 Citations (Scopus)

    Abstract

    Spin injection in organic and molecular spintronic devices is largely defined by the electronic and magnetic structure of the constituting organic/ferromagnetic “spinterfaces‿. Unlike most of the previous studies involving highly interactive organic/metallic interfaces, we present here the valence electronic structure of a weakly hybridized interface between C60 and epitaxial Fe3O4(001), which is unraveled for the first time by means of synchrotron-based photoelectron spectroscopy. Using resonant excitation of Fe 2p core electrons into the unoccupied 3d states, we are able to extract the effect of C60 adsorption on the different ionic sites of the mixed valence magnetic oxide. We elucidate, using a proposed model, that electron donation from C60 leads to surface charge rebalancing in Fe3O4, which is accompanied by an enhancement of the conductivity, where the half-metallic nature of the ferrite is largely preserved. These observations, which have so far not been reported for existing organic/metallic systems, are expected to play a significant role in spin transport across this novel interface. Our work showcases the fascinating physical phenomena unique to organic/magnetic oxide spinterfaces, and offers a new pathway towards interface engineering for organic spintronic applications.
    Original languageUndefined
    Pages (from-to)39-43
    Number of pages5
    JournalOrganic electronics
    Volume29
    DOIs
    Publication statusPublished - Feb 2016

    Keywords

    • EWI-27615
    • EC Grant Agreement nr.: ERC STARTING GRANT 280020
    • EC Grant Agreement nr.: FP7/628063
    • Electron spectroscopy
    • IR-103193
    • Organiceinorganic interfaces
    • Magnetic ultrathin films
    • MagnetiteOrganic semiconductors
    • METIS-321680
    • Spintronics

    Cite this

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    title = "Hybridization-induced charge rebalancing at the weakly interactive C60/Fe3O4(001) spinterface",
    abstract = "Spin injection in organic and molecular spintronic devices is largely defined by the electronic and magnetic structure of the constituting organic/ferromagnetic “spinterfaces‿. Unlike most of the previous studies involving highly interactive organic/metallic interfaces, we present here the valence electronic structure of a weakly hybridized interface between C60 and epitaxial Fe3O4(001), which is unraveled for the first time by means of synchrotron-based photoelectron spectroscopy. Using resonant excitation of Fe 2p core electrons into the unoccupied 3d states, we are able to extract the effect of C60 adsorption on the different ionic sites of the mixed valence magnetic oxide. We elucidate, using a proposed model, that electron donation from C60 leads to surface charge rebalancing in Fe3O4, which is accompanied by an enhancement of the conductivity, where the half-metallic nature of the ferrite is largely preserved. These observations, which have so far not been reported for existing organic/metallic systems, are expected to play a significant role in spin transport across this novel interface. Our work showcases the fascinating physical phenomena unique to organic/magnetic oxide spinterfaces, and offers a new pathway towards interface engineering for organic spintronic applications.",
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    author = "P.K.J. Wong and W. Zhang and {de Jong}, {Machiel Pieter}",
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    Hybridization-induced charge rebalancing at the weakly interactive C60/Fe3O4(001) spinterface. / Wong, P.K.J.; Zhang, W.; de Jong, Machiel Pieter.

    In: Organic electronics, Vol. 29, 02.2016, p. 39-43.

    Research output: Contribution to journalArticleAcademicpeer-review

    TY - JOUR

    T1 - Hybridization-induced charge rebalancing at the weakly interactive C60/Fe3O4(001) spinterface

    AU - Wong, P.K.J.

    AU - Zhang, W.

    AU - de Jong, Machiel Pieter

    N1 - 10.1016/j.orgel.2015.11.031

    PY - 2016/2

    Y1 - 2016/2

    N2 - Spin injection in organic and molecular spintronic devices is largely defined by the electronic and magnetic structure of the constituting organic/ferromagnetic “spinterfaces‿. Unlike most of the previous studies involving highly interactive organic/metallic interfaces, we present here the valence electronic structure of a weakly hybridized interface between C60 and epitaxial Fe3O4(001), which is unraveled for the first time by means of synchrotron-based photoelectron spectroscopy. Using resonant excitation of Fe 2p core electrons into the unoccupied 3d states, we are able to extract the effect of C60 adsorption on the different ionic sites of the mixed valence magnetic oxide. We elucidate, using a proposed model, that electron donation from C60 leads to surface charge rebalancing in Fe3O4, which is accompanied by an enhancement of the conductivity, where the half-metallic nature of the ferrite is largely preserved. These observations, which have so far not been reported for existing organic/metallic systems, are expected to play a significant role in spin transport across this novel interface. Our work showcases the fascinating physical phenomena unique to organic/magnetic oxide spinterfaces, and offers a new pathway towards interface engineering for organic spintronic applications.

    AB - Spin injection in organic and molecular spintronic devices is largely defined by the electronic and magnetic structure of the constituting organic/ferromagnetic “spinterfaces‿. Unlike most of the previous studies involving highly interactive organic/metallic interfaces, we present here the valence electronic structure of a weakly hybridized interface between C60 and epitaxial Fe3O4(001), which is unraveled for the first time by means of synchrotron-based photoelectron spectroscopy. Using resonant excitation of Fe 2p core electrons into the unoccupied 3d states, we are able to extract the effect of C60 adsorption on the different ionic sites of the mixed valence magnetic oxide. We elucidate, using a proposed model, that electron donation from C60 leads to surface charge rebalancing in Fe3O4, which is accompanied by an enhancement of the conductivity, where the half-metallic nature of the ferrite is largely preserved. These observations, which have so far not been reported for existing organic/metallic systems, are expected to play a significant role in spin transport across this novel interface. Our work showcases the fascinating physical phenomena unique to organic/magnetic oxide spinterfaces, and offers a new pathway towards interface engineering for organic spintronic applications.

    KW - EWI-27615

    KW - EC Grant Agreement nr.: ERC STARTING GRANT 280020

    KW - EC Grant Agreement nr.: FP7/628063

    KW - Electron spectroscopy

    KW - IR-103193

    KW - Organiceinorganic interfaces

    KW - Magnetic ultrathin films

    KW - MagnetiteOrganic semiconductors

    KW - METIS-321680

    KW - Spintronics

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    JO - Organic electronics

    JF - Organic electronics

    SN - 1566-1199

    ER -