Volume 78, Number 1, April 2007
|Number of page(s)||4|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||09 March 2007|
Magnetism depending on carrier in (Zn,Co)O
Research Center for Dielectric and Advanced Matter Physics, Pusan National University - Busan 609-735, Korea
2 Department of Physics, Pusan National University - Busan 609-735, Korea
3 Department of Nanomaterials Engineering, Pusan National University - Busan 609-735, Korea
4 Department of Nanomedical Engineering and JRC of PNU-Fraunhofer IGB, Pusan National University Miryang 627-706, Korea
Corresponding author: email@example.com
Accepted: 6 February 2007
The ferromagnetic properties of (Zn,Co)O were observed by a magnetometer at low temperatures. This is, however, inconsistent with the results from the magneto-optical measurements. They reflect the presence of Co metal precipitates in (Zn,Co)O. On the other hand, the formation of Co metal precipitates was strongly suppressed by the additional Cu doping. It appears that the formation of Co metal precipitates is related to the carrier concentration in the system.
PACS: 75.50.Pp – Magnetic semiconductors / 61.72.Vv – Doping and impurity implantation in III-V and II-VI semiconductors / 71.20.-b – Electron density of states and band structure of crystalline solids
© Europhysics Letters Association, 2007
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