Oxygen vacancy-induced room-temperature ferromagnetism in D–D neutron irradiated single-crystal TiO_2(001) rutile  

作　　者：许楠楠 李公平 潘小东 王云波 陈景升 包良满 

机构地区：[1]School of Nuclear Science and Technology, Lanzhou University [2]State Key Laboratory of Crystal Material, Shandong University [3]Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University [4]Department of Materials Science and Engineering, National University of Singapore [5]Shanghai Institute of Applied Physics, Chinese Academy of Sciences

出　　处：《Chinese Physics B》2014年第10期357-361,共5页中国物理B（英文版）

基　　金：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);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.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 do magnetism 

分 类 号：O482.5[理学—固体物理]