Aggregation-based growth and magnetic properties of inhomogeneous Cu-doped ZnO nanocrystals
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摘要The authors report on the ferromagnetic ordering in 1.86 at. % Cu-doped ZnO nanocrystals synthesized by a solvothermal route. The distribution of Cu in ZnO lattice was inhomogeneous. In the Cu-poor cores, a spin-split acceptor impurity band model was proposed to explain the ferromagnetism. While in the Cu-rich surface layers, the shallow donorlike defects generated by imperfect oriented attachment could not only compensate a few holes but also readily occupy the Cu 3d states to destroy CuO4 tetrahedra, hence resulting in the short-range antiferromagnetic clusters. As a result, an interesting exchange biasing phenomenon took place at the ferromagnetic/antiferromagnetic interface. (c) 2007 American Institute of Physics.
著者Wang XF, Xu JB, Cheung WY, An J, Ke N
期刊名稱Applied Physics Letters
出版年份2007
月份5
日期21
卷號90
期次21
出版社AMER INST PHYSICS
國際標準期刊號0003-6951
電子國際標準期刊號1077-3118
語言英式英語
Web of Science 學科類別Physics; Physics, Applied; PHYSICS, APPLIED

上次更新時間 2020-27-11 於 01:35