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

doi:10.1088/1674-1056/23/10/106101

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.

Keywords: D-D neutron single-crystal TiO₂ defects d⁰ magnetism

Received: 28 February 2014
Revised: 03 May 2014
Accepted manuscript online:

PACS:	61.80.-x	(Physical radiation effects, radiation damage)
	61.72.-y	(Defects and impurities in crystals; microstructure)
	75.50.-y	(Studies of specific magnetic materials)

Fund: 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).

Corresponding Authors: Li Gong-Ping
E-mail: ligp@lzu.edu.cn

About author: 61.80.-x; 61.72.-y; 75.50.-y

Cite this article:

Xu Nan-Nan (许楠楠), Li Gong-Ping (李公平), Pan Xiao-Dong (潘小东), Wang Yun-Bo (王云波), Chen Jing-Sheng (陈景升), Bao Liang-Man (包良满) Oxygen vacancy-induced room-temperature ferromagnetism in D-D neutron irradiated single-crystal TiO₂ (001) rutile 2014 Chin. Phys. B 23 106101


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

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