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Tunneling Spectroscopy of Magnetic Impurities (=Mn,Fe,Co) in ZnO

Published online by Cambridge University Press:  01 February 2011

Takashi Tamura ,
Changman Kim ,
Yasushi Oikawa  and
Hajime Ozaki
Takashi Tamura
Affiliation:
[email protected], Waseda university, Electrical Engineering and Bioscience, 3-4-1 #61-308 Ohkubo,Shinzyuku-ku, Tokyo, 169-8555, Japan
Changman Kim
Affiliation:
[email protected], Waseda University, Electrical Engineering and Bioscience, 3-4-1 Ohokubo, Shinjuku-ku, Tokyo, 169-8555, Japan
Yasushi Oikawa
Affiliation:
[email protected], Waseda University, Electrical Engineering and Bioscience, 3-4-1 Ohokubo, Shinjuku-ku, Tokyo, 169-8555, Japan
Hajime Ozaki
Affiliation:
[email protected], Waseda University, Electrical Engineering and Bioscience, 3-4-1 Ohokubo, Shinjuku-ku, Tokyo, 169-8555, Japan
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Abstract

The first observations have been made on the electronic density of states of Mn, Co and Fe-doped ZnO by tunneling spectroscopy. For Mn- and Co-doped ZnO, rising of DOS were observed around 2.8eV and 3.2eV below the bottom of the conduction band, respectively. In these cases, the Fermi level lay at the bottom of the conduction band. For Fe-doped ZnO, the DOS with about 1.2eV width was observed around the Fermi level in the mid-gap. The result reproduced the recent theoretical calculation.

Keywords

spintronicII-VIoxide
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1035: Symposium L – Zinc Oxide and Related Materials–2007 , 2007 , 1035-L05-26
Copyright
Copyright © Materials Research Society 2008

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