Electronic and magnetic structure of C60Fe3O4(001): A hybrid interface for organic spintronics

P.K.J. Wong, W. Zhang, Kai Wang, Gerrit van der Laan, Yongbing Xu, Wilfred Gerard van der Wiel, Machiel Pieter de Jong

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Abstract

We report the electronic and magnetic characterization of the hybrid interface constituted by C60 molecules and an epitaxial Fe3O4(001) surface grown on GaAs(001). Using x-ray absorption spectroscopy (XAS) and x-ray magnetic circular dichroism (XMCD), we demonstrate that a stable C60 sub-monolayer (ML) can be retained on the Fe3O4(001) surface upon in-situ annealing at 250°C. A carbon K-edge dichroic signal of 1% with respect to the XAS C 1s → π* peak intensity has been observed, indicative of a weaker electronic interaction of C60 with Fe3O4(001) compared to the previously reported case of C60/Fe(001). Remarkably, the Fe L-edge XMCD spectrum of Fe3O4(001) reveals a reduced Fe3+/Fe2+ ratio upon C60 sub-ML adsorption. This observation has been ascribed to electron donation by the C60 molecules, as a consequence of the high work function of Fe3O4(001). Our present work underlines the significance of chemical interactions between inorganic magnetic surfaces and molecular adsorbates for tuning the electronic and magnetic properties of the interfaces, which have profound impact on spin-polarized charge transport in hybrid organic-inorganic spintronic devices.
Original languageUndefined
Pages (from-to)1197-1202
Number of pages6
JournalJournal of materials chemistry C
Volume1
Issue number6
DOIs
Publication statusPublished - Dec 2013

Keywords

  • EWI-22750
  • IR-84149
  • METIS-296181
  • SMI-NE: From 2006 in EWI-NE

Cite this

Wong, P.K.J. ; Zhang, W. ; Wang, Kai ; van der Laan, Gerrit ; Xu, Yongbing ; van der Wiel, Wilfred Gerard ; de Jong, Machiel Pieter. / Electronic and magnetic structure of C60Fe3O4(001): A hybrid interface for organic spintronics. In: Journal of materials chemistry C. 2013 ; Vol. 1, No. 6. pp. 1197-1202.
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title = "Electronic and magnetic structure of C60Fe3O4(001): A hybrid interface for organic spintronics",
abstract = "We report the electronic and magnetic characterization of the hybrid interface constituted by C60 molecules and an epitaxial Fe3O4(001) surface grown on GaAs(001). Using x-ray absorption spectroscopy (XAS) and x-ray magnetic circular dichroism (XMCD), we demonstrate that a stable C60 sub-monolayer (ML) can be retained on the Fe3O4(001) surface upon in-situ annealing at 250°C. A carbon K-edge dichroic signal of 1{\%} with respect to the XAS C 1s → π* peak intensity has been observed, indicative of a weaker electronic interaction of C60 with Fe3O4(001) compared to the previously reported case of C60/Fe(001). Remarkably, the Fe L-edge XMCD spectrum of Fe3O4(001) reveals a reduced Fe3+/Fe2+ ratio upon C60 sub-ML adsorption. This observation has been ascribed to electron donation by the C60 molecules, as a consequence of the high work function of Fe3O4(001). Our present work underlines the significance of chemical interactions between inorganic magnetic surfaces and molecular adsorbates for tuning the electronic and magnetic properties of the interfaces, which have profound impact on spin-polarized charge transport in hybrid organic-inorganic spintronic devices.",
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author = "P.K.J. Wong and W. Zhang and Kai Wang and {van der Laan}, Gerrit and Yongbing Xu and {van der Wiel}, {Wilfred Gerard} and {de Jong}, {Machiel Pieter}",
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year = "2013",
month = "12",
doi = "10.1039/C2TC00275B",
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Electronic and magnetic structure of C60Fe3O4(001): A hybrid interface for organic spintronics. / Wong, P.K.J.; Zhang, W.; Wang, Kai; van der Laan, Gerrit; Xu, Yongbing; van der Wiel, Wilfred Gerard; de Jong, Machiel Pieter.

In: Journal of materials chemistry C, Vol. 1, No. 6, 12.2013, p. 1197-1202.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Electronic and magnetic structure of C60Fe3O4(001): A hybrid interface for organic spintronics

AU - Wong, P.K.J.

AU - Zhang, W.

AU - Wang, Kai

AU - van der Laan, Gerrit

AU - Xu, Yongbing

AU - van der Wiel, Wilfred Gerard

AU - de Jong, Machiel Pieter

N1 - eemcs-eprint-22750

PY - 2013/12

Y1 - 2013/12

N2 - We report the electronic and magnetic characterization of the hybrid interface constituted by C60 molecules and an epitaxial Fe3O4(001) surface grown on GaAs(001). Using x-ray absorption spectroscopy (XAS) and x-ray magnetic circular dichroism (XMCD), we demonstrate that a stable C60 sub-monolayer (ML) can be retained on the Fe3O4(001) surface upon in-situ annealing at 250°C. A carbon K-edge dichroic signal of 1% with respect to the XAS C 1s → π* peak intensity has been observed, indicative of a weaker electronic interaction of C60 with Fe3O4(001) compared to the previously reported case of C60/Fe(001). Remarkably, the Fe L-edge XMCD spectrum of Fe3O4(001) reveals a reduced Fe3+/Fe2+ ratio upon C60 sub-ML adsorption. This observation has been ascribed to electron donation by the C60 molecules, as a consequence of the high work function of Fe3O4(001). Our present work underlines the significance of chemical interactions between inorganic magnetic surfaces and molecular adsorbates for tuning the electronic and magnetic properties of the interfaces, which have profound impact on spin-polarized charge transport in hybrid organic-inorganic spintronic devices.

AB - We report the electronic and magnetic characterization of the hybrid interface constituted by C60 molecules and an epitaxial Fe3O4(001) surface grown on GaAs(001). Using x-ray absorption spectroscopy (XAS) and x-ray magnetic circular dichroism (XMCD), we demonstrate that a stable C60 sub-monolayer (ML) can be retained on the Fe3O4(001) surface upon in-situ annealing at 250°C. A carbon K-edge dichroic signal of 1% with respect to the XAS C 1s → π* peak intensity has been observed, indicative of a weaker electronic interaction of C60 with Fe3O4(001) compared to the previously reported case of C60/Fe(001). Remarkably, the Fe L-edge XMCD spectrum of Fe3O4(001) reveals a reduced Fe3+/Fe2+ ratio upon C60 sub-ML adsorption. This observation has been ascribed to electron donation by the C60 molecules, as a consequence of the high work function of Fe3O4(001). Our present work underlines the significance of chemical interactions between inorganic magnetic surfaces and molecular adsorbates for tuning the electronic and magnetic properties of the interfaces, which have profound impact on spin-polarized charge transport in hybrid organic-inorganic spintronic devices.

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KW - IR-84149

KW - METIS-296181

KW - SMI-NE: From 2006 in EWI-NE

U2 - 10.1039/C2TC00275B

DO - 10.1039/C2TC00275B

M3 - Article

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EP - 1202

JO - Journal of materials chemistry C

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SN - 2050-7526

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