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Room Temperature Ferromagnetism in Spin-coated Anatase- and Rutile- Ti1-x Mx O2 ( M= Fe, Mn, Co) Films

Published online by Cambridge University Press:  31 January 2011

Danilo Barrionuevo ,
Surinder P Singh  and
Maharaj S. Tomar
Danilo Barrionuevo
Affiliation:
[email protected]@upr.edu
Surinder P Singh
Affiliation:
[email protected], Mayaguez, Puerto Rico
Maharaj S. Tomar
Affiliation:
[email protected], University of Puerto Rico, Department of Physics, Mayaguez, Puerto Rico
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Abstract

Diluted magnetic semiconductors (DMS) have been explored extensively, because of their potential application in spintronic devices. We studied the structural optical and magnetic properties of Ti1-xMxO2 (M= Fe, Mn, Co; x = 0.00, 0.05, 0.08, 0.10, 0.15, 0.20, 0.25, 0.30), thin films by sol-gel process and deposited using spin coating on Pt (Pt/Ti/SiO2/Si) and quartz substrates. X-ray diffraction studies and Raman spectroscopy reveal anatase and rutile phases of the synthesized films when annealed at 500 and 10000 C, respectively. Optical transmission measurements show high degree of transparency that decreases with increase in transition metal ion concentration. The films show room temperature ferromagnetism, suggesting their potential in spin based heterojunction devices.

Keywords

ferromagneticsol-gelspintronic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1201: Symposium H – Zinc Oxide and Related Materials-2009 , 2009 , 1201-H10-07
Copyright
Copyright © Materials Research Society 2010

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