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期刊论文
Characteristics of Ni-doped ZnO:Al films grown on glass by direct current magnetron co-sputtering
Thin Solid Films 515(2007)3905-3909,-0001,():
About 250 nm-thick Ni-doped ZnO:Al films were deposited on glass substrates at 300 K, 473 K and 673 K by direct current magnetron cosputtering. Atomic ratio of Zn:Al:Ni in the film is 100:5:4. All the films have a ZnO wurtzite structure and grow mainly with their crystallographic c-axis perpendicular to the substrate. The films deposited at 300 K and 673 K consist of granular grains whereas the film grown at 473 K mainly has a dense columnar structure. The Ni-doped ZnO:Al film grown at 473 K has the lowest resistivity of 7.7×10−3 Ωcm. All the films have an average optical transmittance of over 90% in the visible wavelength range. The absorption edge of the film grown at 473 K shifts to the shorter wavelength (blueshift) relative to those deposited at 300 K and 673 K. When the substrate temperature reaches 673 K, the Ni-doped ZnO:Al film shows a magnetization curve at room temperature, indicating that the film has a hard magnetization characteristic. The saturation magnetization is about 1×10−4 T and the saturation field is about 3.2×105 A/m.
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