Magnetic Properties in Co and Mn-Doped ZnO Powders and Thin Films
Zn0.86Co0.14O powder and thin films were prepared by standard solid-state reaction processes and radio-frequency (RF) magnetron sputtering. Magnetic measurements indicate that the powder is paramagnetic for temperatures above 3 K, while the thin films annealed
in vacuum are ferromagnetic at room temperature. The saturated magnetization was found to be about 0.6 μ
B/Co, while the coercive force was found to be 200 Oe at room temperature. The very similar results were also obtained in Zn0.96Mn0.04O powder
and thin films. Such different results for the powder and thin films indicate that growth conditions and defects play an important role in producing ferromagnetism.
Keywords: CO AND MN DOPED ZNO; DILUTED MAGNETIC SEMICONDUCTORS; MAGNETIC PROPERTIES
Document Type: Research Article
Publication date: 01 February 2009
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