中国物理B ›› 2011, Vol. 20 ›› Issue (4): 47505-047505.doi: 10.1088/1674-1056/20/4/047505

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Optical and magnetic properties of nitrogen ion implanted MgO single crystal

刘春明1, 顾海权1, 向霞1, 蒋勇1, 陈猛1, 祖小涛1, 张焱2   

  1. (1)Department of Applied Physics, University of Electronic Science and Technology of China, Chengdu 610054, China; (2)School of Physics, Peking University, Beijing 100871, China
  • 收稿日期:2010-09-25 修回日期:2010-12-08 出版日期:2011-04-15 发布日期:2011-04-15
  • 基金资助:

    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).

Optical and magnetic properties of nitrogen ion implanted MgO single crystal

Liu Chun-Ming(刘春明)a)†, Gu Hai-Quan(顾海权) a), Xiang Xia(向霞)a), Zhang Yan(张焱)b), Jiang Yong(蒋勇) a), Chen Meng(陈猛)a), and Zu Xiao-Tao(祖小涛)a)   

  1. a Department of Applied Physics, University of Electronic Science and Technology of China, Chengdu 610054, China; b School of Physics, Peking University, Beijing 100871, China
  • Received:2010-09-25 Revised:2010-12-08 Online:2011-04-15 Published:2011-04-15
  • Supported by:

    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).

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摘要：

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.

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.

Key words: nitrogen implanted MgO, magnetism, optical property, microstructure

中图分类号:  (Studies of specific magnetic materials)

  • 75.50.-y
78.20.-e (Optical properties of bulk materials and thin films)