Journal
APPLIED PHYSICS LETTERS
Volume 84, Issue 14, Pages 2608-2610Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1691499
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The magnetic and phase properties of CoxTi1-xO2 anatase thin films grown epitaxially on (001) LaAlO3 by a reactive rf magnetron cosputter deposition have been examined. CoxTi1-xO2 (x=0.07) thin films exhibit room-temperature ferromagnetism, as evidenced by hysteresis in M-H loop. Chemical mapping indicates segregation of the Co dopant atoms in these films. However, x-ray photoelectron spectroscopy suggests that the segregated Co is not metallic, but in the Co+2 state. These results are consistent with a segregated Ti-Co-O phase being responsible for the ferromagnetic behavior. (C) 2004 American Institute of Physics.
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