中国物理B ›› 2014, Vol. 23 ›› Issue (10): 106101-106101.doi: 10.1088/1674-1056/23/10/106101

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Oxygen vacancy-induced room-temperature ferromagnetism in D-D neutron irradiated single-crystal TiO2 (001) rutile

许楠楠a, 李公平a b c, 潘小东a, 王云波a, 陈景升d, 包良满e   

  1. a School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China;
    b State Key Laboratory of Crystal Material, Shandong University, Jinan 250001, China;
    c Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875, China;
    d Department of Materials Science and Engineering, National University of Singapore, Singapore 117608, Singapore;
    e Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
  • 收稿日期:2014-02-28 修回日期:2014-05-03 出版日期:2014-10-15 发布日期:2014-10-15
  • 基金资助:
    Project supported by the Open Project of Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University (Grant No. LZUMMM2012003), the Open Project of Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University (Grant No. 201204), and the Open Project of State Key Laboratory of Crystal Material, Shandong University, China (Grant No. KF1311).

Oxygen vacancy-induced room-temperature ferromagnetism in D-D neutron irradiated single-crystal TiO2 (001) rutile

Xu Nan-Nan (许楠楠)a, Li Gong-Ping (李公平)a b c, Pan Xiao-Dong (潘小东)a, Wang Yun-Bo (王云波)a, Chen Jing-Sheng (陈景升)d, Bao Liang-Man (包良满)e   

  1. a School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China;
    b State Key Laboratory of Crystal Material, Shandong University, Jinan 250001, China;
    c Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875, China;
    d Department of Materials Science and Engineering, National University of Singapore, Singapore 117608, Singapore;
    e Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
  • Received:2014-02-28 Revised:2014-05-03 Online:2014-10-15 Published:2014-10-15
  • Contact: Li Gong-Ping E-mail:ligp@lzu.edu.cn
  • About author:61.80.-x; 61.72.-y; 75.50.-y
  • Supported by:
    Project supported by the Open Project of Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University (Grant No. LZUMMM2012003), the Open Project of Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University (Grant No. 201204), and the Open Project of State Key Laboratory of Crystal Material, Shandong University, China (Grant No. KF1311).

摘要: Remarkable room temperature ferromagnetism in pure single-crystal rutile TiO2 (001) samples irradiated by D-D neutron has been investigated. By combining X-ray diffraction and positron annihilation lifetime, the contracted lattice has been clearly identified in irradiated TiO2, where Ti4+ ions can be easily reduced to the state of Ti3+. As there were no magnetic impurities that could contaminate the samples during the whole procedure, some Ti3+ ions reside on interstitial or substituted sites accompanied by oxygen vacancies should be responsible for the ferromagnetism.

关键词: D-D neutron, single-crystal TiO2, defects, d0 magnetism

Abstract: Remarkable room temperature ferromagnetism in pure single-crystal rutile TiO2 (001) samples irradiated by D-D neutron has been investigated. By combining X-ray diffraction and positron annihilation lifetime, the contracted lattice has been clearly identified in irradiated TiO2, where Ti4+ ions can be easily reduced to the state of Ti3+. As there were no magnetic impurities that could contaminate the samples during the whole procedure, some Ti3+ ions reside on interstitial or substituted sites accompanied by oxygen vacancies should be responsible for the ferromagnetism.

Key words: D-D neutron, single-crystal TiO2, defects, d0 magnetism

中图分类号:  (Physical radiation effects, radiation damage)

  • 61.80.-x
61.72.-y (Defects and impurities in crystals; microstructure) 75.50.-y (Studies of specific magnetic materials)