NDLI: Room Temperature Ferromagnetism in <formula formulatype=inline><tex Notation=TeX>$({hbox {Zn}}_{1-{rm x}},{hbox {Mg}}

Content Provider	IEEE Xplore Digital Library
Author	Yuwei Ma Jun Ding Lap Chan Jiabao Yi Tun Seng Herng Huang, S. Xuelian Huang
Copyright Year	1965
Abstract	In this work, room temperature ferromagnetism was found in (Zn_1-x, Mg_x)O film with certain Mg compositions (0.06 < x < 0.50). Below the threshold composition (x < 0.06), the film shows no room temperature ferromagnetism (RTFM) and almost no ZnO nanocrystals (NCs) were found in the film. RTF starts to appear in the (Zn_0.94, Mg_0.06)O film, and it becomes maximum in (Zn_1-x, Mg_x)O film with x = 0.20. By detailed analysis of microstructure of the film using high resolution transmission electron microscopy (HRTEM), we found that ZnO NCs were embedded in the ZnO-MgO amorphous phase. Photoluminescence (PL) results show that defects concentrations are quite high in the film. With further increment of Mg composition (x > 0.50), ferromagnetism disappears and the film becomes fully amorphous. Besides, the defects concentration of the film is significantly reduced. The mechanism of RTFM in ZnO-MgO system may be attributed to the interaction ZnO NCs and defects surrounding them.
Sponsorship	IEEE Magnetics Society
Starting Page	1338
Ending Page	1341
Page Count	4
File Size	1166101
File Format	PDF
ISSN	00189464
Volume Number	46
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Temperature Zinc oxide Amorphous magnetic materials Saturation magnetization Optical films Magnetic films Semiconductor films Amorphous materials Pulsed laser deposition Magnetic semiconductors ZnO Dilute magnetic semiconductor nanocrystals room temperature ferromagnetism
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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