Influence of CO adsorption on the magnetism of small Co particles deposited on 
Al2O3

Hill, Thomas; Mozaffari-Afshar, Mohsen; Schmidt, Jörg; Risse, Thomas; Stempel, Sascha; Heemeier, Michael; Freund, Hans-Joachim

doi:10.1016/S0009-2614(98)00690-3

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Influence of CO adsorption on the magnetism of small Co particles deposited on Al₂O₃

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Hill, Thomas
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Mozaffari-Afshar, Mohsen
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Schmidt, Jörg
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Risse, Thomas
Chemical Physics, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons22139

Stempel, Sascha
Chemical Physics, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons21610

Heemeier, Michael
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Freund, Hans-Joachim
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Citation

Hill, T., Mozaffari-Afshar, M., Schmidt, J., Risse, T., Stempel, S., Heemeier, M., et al. (1998). Influence of CO adsorption on the magnetism of small Co particles deposited on Al₂O₃. Chemical Physics Letters, 292(4-6), 524-530. doi:10.1016/S0009-2614(98)00690-3.

Cite as: https://hdl.handle.net/21.11116/0000-0007-1AB7-E

Abstract

Ferromagnetic resonance under ultrahigh vacuum conditions was used to study the magnetic properties of small cobalt particles deposited on the reconstructed surface of a sapphire single crystal ((31x31)R±9° Al₂O₃(0001)). The intensity of the resonance line decreases after CO adsorption but the signal is not totally quenched. Therefore, only the atoms in the outer sphere of the cluster are influenced and a magnetic core still remains. STM measurements of Co particles on a thin alumina film Al₂O₃/NiAl(110) support this assumption of three-dimensional growth.