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  Unraveling the mark of surface defects on a spinterface: The nitronyl nitroxide/TiO2(110) interface

Kakavandi, R., Calzolari, A., Borozdina, Y., Ravat, P., Chassé, T., & Baumgarten, M. (2016). Unraveling the mark of surface defects on a spinterface: The nitronyl nitroxide/TiO2(110) interface. Nano Research, 9(11), 3515-3527. doi:10.1007/s12274-016-1228-1.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0000-795B-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0000-795C-2
Genre: Journal Article

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Kakavandi, R, Author
Calzolari, A, Author
Borozdina, YB1, Author              
Ravat, P, Author
Chassé, T, Author
Baumgarten, M, Author
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1Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794              

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 Abstract: Metal-free organic radicals are fascinating materials owing to their unique properties. Having a stable magnetic moment coupled to light elements makes these materials central to develop a large variety of applications. We investigated the magnetic spinterface coupling between the surface of a single rutile TiO2(110) crystal and a pyrene-based nitronyl nitroxide radical, using a combination of thickness-dependent X-ray photoelectron spectroscopy and ab initio calculations. The radicals were physisorbed, and their magnetic character was preserved on the (almost) ideal surface. The situation changed completely when the molecules interacted with a surface defect site upon adsorption. In this case, the reactivity of the defect site led to the quenching of the molecular magnetic moment. Our work elucidates the crucial role played by the surface defects and demonstrates that photoemission spectroscopy combined with density functional theory calculations can be used to shed light on the mechanisms governing complex interfaces, such as those between magnetic molecules and metal oxides.

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 Dates: 2016-11
 Publication Status: Published in print
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 Identifiers: DOI: 10.1007/s12274-016-1228-1
BibTex Citekey: KakavandiCBRCB2016
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Title: Nano Research
Source Genre: Journal
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Pages: - Volume / Issue: 9 (11) Sequence Number: - Start / End Page: 3515 - 3527 Identifier: -