Optical and magnetic properties of nitrogen ion implanted MgO single crystal

doi:10.1088/1674-1056/20/4/047505

Abstract

The microstructure, optical property and magnetism of nitrogen ion implanted single MgO crystals are studied. A parallel investigation is also performed in an iron ion implanted single MgO sample as a reference. Large structural, optical and magnetic differences are obtained between the nitrogen and iron implanted samples. Room temperature ferromagnetism with a fairly large coercivity field of 300 Oe (1 Oe=79.5775 A/m), a remanence of 38% and a slightly changed optical absorption is obtained in the sample implanted using nitrogen with a dose of 1×10¹⁸ ions/cm². Transition metal contamination and defects induced magnetism can be excluded when compared with those of the iron ion implanted sample, and the nitrogen doping is considered to be the main origin of ferromagnetism.

Keywords: nitrogen implanted MgO magnetism optical property microstructure

Received: 25 September 2010
Revised: 08 December 2010
Accepted manuscript online:

PACS:	75.50.-y	(Studies of specific magnetic materials)
	78.20.-e	(Optical properties of bulk materials and thin films)

Fund:

Project supported by the National Natural Science Foundation of China (Grant No. 10904008) and the Foundation for Young Scholars of University of Electronic Science and Technology of China (Grant Nos. L08010401JX0806).

Cite this article:

Liu Chun-Ming(刘春明), Gu Hai-Quan(顾海权), Xiang Xia(向霞), Zhang Yan(张焱), Jiang Yong(蒋勇), Chen Meng(陈猛), and Zu Xiao-Tao(祖小涛) Optical and magnetic properties of nitrogen ion implanted MgO single crystal 2011 Chin. Phys. B 20 047505

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