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

• DOI: 10.1002/adma.200803019
• Publication Date: 2009-03-23T13:39:28Z
• Authors: Shixiong Zhang; Satishchandra B. ...; Weiqiang Yu; Xingyu Gao; Tao Liu; Saurabh Ghosh; Gour P. Das; Andrew T. S. Wee; Richard L. Greene; Thirumalai Venkat...
• Keywords: Magnetism; Pulsed Laser Deposition; Magnetic semiconductor

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 magnetism is attributed to cation (Ti) vacancies, confirmed X-ray absorption spectroscopy and first-principle calculations. Ti vacancies are controlled oxygen partial pressure during growth.