Spin coupling and orbital angular momentum quenching in free iron clusters

M. Niemeyer, K. Hirsch, V. Zamudio-Bayer, A. Langenberg, M. Vogel, M. Kossick, C. Ebrecht, K. Egashira, A. Terasaki, T. Möller, B. V. Issendorff, J. T. Lau

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Abstract

Magnetic spin and orbital moments of size-selected free iron cluster ions Fen+ (n=3-20) have been determined via x-ray magnetic circular dichroism spectroscopy. Iron atoms within the clusters exhibit ferromagnetic coupling except for Fe13+, where the central atom is coupled antiferromagnetically to the atoms in the surrounding shell. Even in very small clusters, the orbital magnetic moment is strongly quenched and reduced to 5%-25% of its atomic value while the spin magnetic moment remains at 60%-90%. This demonstrates that the formation of bonds quenches orbital angular momenta in homonuclear iron clusters already for coordination numbers much smaller than those of the bulk.

Original languageEnglish
Article number057201
JournalPhysical Review Letters
Volume108
Issue number5
DOIs
Publication statusPublished - Jan 30 2012

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angular momentum
quenching
iron
orbitals
magnetic moments
atoms
coordination number
dichroism
moments
spectroscopy
ions
x rays

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Niemeyer, M., Hirsch, K., Zamudio-Bayer, V., Langenberg, A., Vogel, M., Kossick, M., ... Lau, J. T. (2012). Spin coupling and orbital angular momentum quenching in free iron clusters. Physical Review Letters, 108(5), [057201]. https://doi.org/10.1103/PhysRevLett.108.057201

Spin coupling and orbital angular momentum quenching in free iron clusters. / Niemeyer, M.; Hirsch, K.; Zamudio-Bayer, V.; Langenberg, A.; Vogel, M.; Kossick, M.; Ebrecht, C.; Egashira, K.; Terasaki, A.; Möller, T.; V. Issendorff, B.; Lau, J. T.

In: Physical Review Letters, Vol. 108, No. 5, 057201, 30.01.2012.

Research output: Contribution to journalArticle

Niemeyer, M, Hirsch, K, Zamudio-Bayer, V, Langenberg, A, Vogel, M, Kossick, M, Ebrecht, C, Egashira, K, Terasaki, A, Möller, T, V. Issendorff, B & Lau, JT 2012, 'Spin coupling and orbital angular momentum quenching in free iron clusters', Physical Review Letters, vol. 108, no. 5, 057201. https://doi.org/10.1103/PhysRevLett.108.057201
Niemeyer M, Hirsch K, Zamudio-Bayer V, Langenberg A, Vogel M, Kossick M et al. Spin coupling and orbital angular momentum quenching in free iron clusters. Physical Review Letters. 2012 Jan 30;108(5). 057201. https://doi.org/10.1103/PhysRevLett.108.057201
Niemeyer, M. ; Hirsch, K. ; Zamudio-Bayer, V. ; Langenberg, A. ; Vogel, M. ; Kossick, M. ; Ebrecht, C. ; Egashira, K. ; Terasaki, A. ; Möller, T. ; V. Issendorff, B. ; Lau, J. T. / Spin coupling and orbital angular momentum quenching in free iron clusters. In: Physical Review Letters. 2012 ; Vol. 108, No. 5.
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