Exchange bias and the origin of magnetism in Mn-doped ZnO tetrapods

R. K. Zheng; H. Liu; X. X. Zhang; V. A L Roy; A. B. Djurišić

doi:10.1063/1.1795366

Exchange bias and the origin of magnetism in Mn-doped ZnO tetrapods

Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review

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Author(s)

R. K. Zheng
H. Liu
X. X. Zhang
V. A L Roy
A. B. Djurišić

Detail(s)

Original language	English
Pages (from-to)	2589-2591
Journal / Publication	Applied Physics Letters
Volume	85
Issue number	13
Publication status	Published - 27 Sep 2004
Externally published	Yes

Link(s)

DOI	DOI https://doi.org/10.1063/1.1795366 Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-7544247004&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(924fffe9-c89b-4550-a4f3-7f9eb34bfd4c).html

Abstract

The origin of magnetism and exchange bias of Mn-doped ZnO tetrapod nanostructures were investigated. The nanostructures were synthesized by evaporating Zn metal under humid argon flow and then Mn was doped into ZnO nanostructures by diffusion at 600°C. High-resolution transmission electron microscopy observations were used to investigate the existence of surface layers in the tetrapods. At 100 Oe field, the zero-field cooled (ZFC) and field cooled (FC) magnetizations of the sample nanostructures were determined. It was observed that the exchange bias in the sample was due to exchange interaction between ferrimagnetic phase in manganese oxides.