Abstract
| Original language | Undefined |
|---|---|
| Pages (from-to) | 0825061-0825063 |
| Number of pages | 3 |
| Journal | Applied physics letters |
| Volume | 96 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2010 |
Keywords
- EWI-19222
- METIS-276273
- IR-75550
Cite this
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Magnetism and heterogeneity of Co in anatase Co:TiO2 magnetic semiconductor. / Lee, Y.J.; de Jong, Machiel Pieter; Jansen, R.
In: Applied physics letters, Vol. 96, No. 8, 2010, p. 0825061-0825063.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Magnetism and heterogeneity of Co in anatase Co:TiO2 magnetic semiconductor
AU - Lee, Y.J.
AU - de Jong, Machiel Pieter
AU - Jansen, R.
N1 - 10.1063/1.3327805
PY - 2010
Y1 - 2010
N2 - Using x-ray magnetic circular dichroism XMCD, x-ray absorption spectroscopy XAS, and energy filtered transmission electron microscopy, we provide evidence for a heterogeneous Co distribution in anatase Co:TiO2 magnetic semiconductor having a low Co concentration 1.4 at. %. Multiplet structure due to Co2+ is observed in XAS spectra, but suppressed due to the coexistence of metallic Co clusters and substitutional Co ions, whereas XMCD spectra resemble metallic Co. The presence of Co2+ can be correlated with earlier observations of impurity band conduction and Kondo behavior, whereas metallic Co clusters contribute to the ferromagnetism and anomalous Hall effect.
AB - Using x-ray magnetic circular dichroism XMCD, x-ray absorption spectroscopy XAS, and energy filtered transmission electron microscopy, we provide evidence for a heterogeneous Co distribution in anatase Co:TiO2 magnetic semiconductor having a low Co concentration 1.4 at. %. Multiplet structure due to Co2+ is observed in XAS spectra, but suppressed due to the coexistence of metallic Co clusters and substitutional Co ions, whereas XMCD spectra resemble metallic Co. The presence of Co2+ can be correlated with earlier observations of impurity band conduction and Kondo behavior, whereas metallic Co clusters contribute to the ferromagnetism and anomalous Hall effect.
KW - EWI-19222
KW - METIS-276273
KW - IR-75550
U2 - 10.1063/1.3327805
DO - 10.1063/1.3327805
M3 - Article
VL - 96
SP - 825061
EP - 825063
JO - Applied physics letters
JF - Applied physics letters
SN - 0003-6951
IS - 8
ER -