Spin State in Perfluorinated FePc Films on Cu(111) and Ag(111) in Dependence on Film Thickness

Axel Belser, Reimer Karstens, Peter Grüninger, Peter Nagel, Michael Merz, Stefan Schuppler, Elizaveta A. Suturina, Angelika Chassé, Thomas Chassé, Heiko Peisert

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The electronic structure of the central iron ion of perfluorinated iron phthalocyanine (FePcF16) in thin films has been studied on Cu(111) and Ag(111) using polarization dependent X-ray absorption spectroscopy (XAS). The data are compared to FePc on Ag(111). Ligand field parameters have been computed, and multiplet calculations (CTM4XAS) were carried out to simulate XAS spectra. The planar molecules are preferentially oriented lying flat on the substrate surface during the growth of the 1-4 nm thick films. A clear polarization dependence of the Fe L edge absorption spectra is observed, arising from transitions into orbitals with in-plane and out-of-plane character. The shape of the spectra for three to four monolayers of FePcF16 on Cu(111) is comparable to that of the thin films of FePc on Ag(111). However, a drastic change of the XAS peak shape is observed for thicker FePcF16 films on both Ag(111) and Cu(111), although the molecular orientation is very similar to coverages consisting of a few monolayers. Since in both cases the film thickness is distinctly beyond the monolayer regime, interface interactions can be ruled out as a possible origin of this behavior. Rather, the different XAS peak shapes seem to indicate that the multiplicity may depend on the detailed arrangement of the FePcF16 molecules. The large flexibility of the ground state of Fe could be of high interest for spintronic applications.

Original languageEnglish
Pages (from-to)15390-15394
Number of pages5
JournalJournal of Physical Chemistry C
Volume122
Issue number27
Early online date8 Jun 2018
DOIs
Publication statusPublished - 12 Jul 2018

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X ray absorption spectroscopy
Film thickness
absorption spectroscopy
film thickness
Monolayers
x rays
Polarization
Iron
iron
Thin films
Magnetoelectronics
Molecules
Molecular orientation
polarization
thin films
Electron transitions
Thick films
Ground state
thick films
Electronic structure

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

Belser, A., Karstens, R., Grüninger, P., Nagel, P., Merz, M., Schuppler, S., ... Peisert, H. (2018). Spin State in Perfluorinated FePc Films on Cu(111) and Ag(111) in Dependence on Film Thickness. Journal of Physical Chemistry C, 122(27), 15390-15394. https://doi.org/10.1021/acs.jpcc.8b03436

Spin State in Perfluorinated FePc Films on Cu(111) and Ag(111) in Dependence on Film Thickness. / Belser, Axel; Karstens, Reimer; Grüninger, Peter; Nagel, Peter; Merz, Michael; Schuppler, Stefan; Suturina, Elizaveta A.; Chassé, Angelika; Chassé, Thomas; Peisert, Heiko.

In: Journal of Physical Chemistry C, Vol. 122, No. 27, 12.07.2018, p. 15390-15394.

Research output: Contribution to journalArticle

Belser, A, Karstens, R, Grüninger, P, Nagel, P, Merz, M, Schuppler, S, Suturina, EA, Chassé, A, Chassé, T & Peisert, H 2018, 'Spin State in Perfluorinated FePc Films on Cu(111) and Ag(111) in Dependence on Film Thickness', Journal of Physical Chemistry C, vol. 122, no. 27, pp. 15390-15394. https://doi.org/10.1021/acs.jpcc.8b03436
Belser, Axel ; Karstens, Reimer ; Grüninger, Peter ; Nagel, Peter ; Merz, Michael ; Schuppler, Stefan ; Suturina, Elizaveta A. ; Chassé, Angelika ; Chassé, Thomas ; Peisert, Heiko. / Spin State in Perfluorinated FePc Films on Cu(111) and Ag(111) in Dependence on Film Thickness. In: Journal of Physical Chemistry C. 2018 ; Vol. 122, No. 27. pp. 15390-15394.
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