Kondo effect and impurity band conduction in Co:TiO2 magnetic semiconductor

R. Ramaneti; J.C. Lodder; R. Jansen

doi:10.1103/PhysRevB.76.195207

Kondo effect and impurity band conduction in Co:TiO₂ magnetic semiconductor

R. Ramaneti
, J.C. Lodder
, R. Jansen

Research output: Contribution to journal › Article › Academic › peer-review

22 Citations (Scopus)

296 Downloads (Pure)

Abstract

The nature of charge carriers and their interaction with local magnetic moments in an oxide magnetic semiconductor is established. For cobalt-doped anatase TiO2 films, we demonstrate conduction in a metallic donor-impurity band. Moreover, we observe a clear signature of the Kondo effect in electrical transport data with remarkably high Kondo temperatures of up to 120 K. This indicates a strong coupling between local Co moments and delocalized electrons in the impurity band.

Original language	Undefined
Pages (from-to)	195207-195207
Number of pages	5
Journal	Physical review B: Condensed matter and materials physics
Volume	76
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevB.76.195207
Publication status	Published - 26 Nov 2007

Keywords

IR-58272
EWI-12087
METIS-247019

Access to Document

10.1103/PhysRevB.76.195207

kondo_effect

http://eprints.eemcs.utwente.nl/secure2/12087/01/Ramaneti-PRB76-195207-2007.pdf

Cite this

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abstract = "The nature of charge carriers and their interaction with local magnetic moments in an oxide magnetic semiconductor is established. For cobalt-doped anatase TiO2 films, we demonstrate conduction in a metallic donor-impurity band. Moreover, we observe a clear signature of the Kondo effect in electrical transport data with remarkably high Kondo temperatures of up to 120 K. This indicates a strong coupling between local Co moments and delocalized electrons in the impurity band.",

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AU - Lodder, J.C.

AU - Jansen, R.

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N2 - The nature of charge carriers and their interaction with local magnetic moments in an oxide magnetic semiconductor is established. For cobalt-doped anatase TiO2 films, we demonstrate conduction in a metallic donor-impurity band. Moreover, we observe a clear signature of the Kondo effect in electrical transport data with remarkably high Kondo temperatures of up to 120 K. This indicates a strong coupling between local Co moments and delocalized electrons in the impurity band.

AB - The nature of charge carriers and their interaction with local magnetic moments in an oxide magnetic semiconductor is established. For cobalt-doped anatase TiO2 films, we demonstrate conduction in a metallic donor-impurity band. Moreover, we observe a clear signature of the Kondo effect in electrical transport data with remarkably high Kondo temperatures of up to 120 K. This indicates a strong coupling between local Co moments and delocalized electrons in the impurity band.

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KW - METIS-247019

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DO - 10.1103/PhysRevB.76.195207

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