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http://dx.doi.org/10.4283/JKMS.2006.16.4.206

Room-temperature Ferromagnetism in Oxygen-deficient TiO2-δ Thin Films  

Park, Young-Ran (Department of Physics, Konkuk University)
Kim, Kwang-Joo (Department of Physics, Konkuk University)
Yang, Woo-Il (Department of Physics, Konkuk University)
Lee, Sang-Young (Department of Physics, Konkuk University)
Kim, Chul-Sung (Department of Physics, Kookmin University)
Publication Information
Journal of the Korean Magnetics Society / v.16, no.4, 2006 , pp. 206-210 More about this Journal
Abstract
A room-temperature ferromagnetism has been observed for oxygen-deficient rutile and anatase $TiO_{2-{\delta}}$ films. XPS data revealed the existence of $Ti^{3+}$ ions, for compensating the charge imbalance caused by oxygen vacancies in the film. The observed ferromagnetism is attributable to the spin ($3d^1$) alignment of the $Ti^{3+}$ ions. Such spin alignment can happen through magnetic polaron formed by trapped electron in oxygen vacancy and magnetic $Ti^{3+}$ ions around it.
Keywords
Ti$O_2$; thin film; oxygen vacancy; ferromagnetism; polaron;
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Times Cited By KSCI : 1  (Citation Analysis)
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