Large magnetic moment observed in Co-doped ZnO nanocluster-assembled thin films at room temperature

被引：53

作者：

Zhao, Z. W. ^{[1
]}

Tay, B. K.

Chen, J. S.

Hu, J. F.

Lim, B. C.

Li, G. P.

机构：

[1] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 637798, Singapore

[2] Data Storage Inst, Singapore 117608, Singapore

[3] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 119260, Singapore

[4] Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 15期

关键词：

D O I：

10.1063/1.2721140

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Co-doped ZnO nanocluster-assembled films were deposited by nanocluster-beam deposition. Zn0.986Co0.014O nanoclusters remained wurtzite in structure with size of 5 nm. Compared with bulk ZnO, a blueshift of 0.28 eV was observed in the absorption edge of the film. Two photo-luminescence bands at 378 and 510 nm were detected. Room-temperature ferromagnetism was observed in doped ZnO nanocluster-assembled film. Moreover, it exhibited a large saturated magnetization of 1.4 mu(B)/Co and increased to 3.65 mu(B)/Co after the film was annealed. The possible mechanisms on the observed ferromagnetism and enhanced magnetic moment were discussed. (c) 2007 American Institute of Physics.

引用

页数：3

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