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 con...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.展开更多
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)
文摘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.
