4.8 Article

Electronic Manifestation of Cation-Vacancy-Induced Magnetic Moments in a Transparent Oxide Semiconductor: Anatase Nb:TiO2

Journal

ADVANCED MATERIALS
Volume 21, Issue 22, Pages 2282-+

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.200803019

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Funding

  1. Board of Research in Nuclear Sciences, Department of Atomic Energy (Government of India)
  2. NANOCORE/ NUSNNI
  3. Center for Nanophysics and Advanced Materials
  4. National Basic Research Program of China [2007CB925001]

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Nb-doped anatase TiO2 thin films grown by pulsed-laser deposition show Kondo scattering in elctronic-transport measurements, providing evidence for the formation of magnetic moments. The origin of magnetism is attributed to cation (Ti) vacancies, confirmed by X-ray absorption spectroscopy and first-principle calculations. The Ti vacancies are controlled by oxygen partial pressure during growth.

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