Reddy, K M and Hays, J and Kundu, S and Dua, L K and Biswas, Prasanta Kumar and Wang, C and Shutthanandan, V and Engelhard, M H and Mathew, X and Punnoose, A (2007) Effect of Mn doping on the structural, morphological, optical and magnetic properties of indium tin oxide films. Journal of Materials Science-Materials in Electronics, 18 (12). pp. 1197-1201. ISSN 0957-4522

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We report on the preparation and characterization of high purity manganese (3-9 wt.%) doped indium tin oxide (ITO, In:Sn = 90:10) films deposited by sol-gel mediated dip coating. X-ray diffraction and selected area electron diffraction showed high phase purity cubic In2O3 and indicated a contraction of the lattice with Mn doping. High-resolution transmission electron microscopy depicted a uniform distribution of similar to 20 nm sized independent particles and particle induced x-ray emission studies confirmed the actual Mn ion concentration. UV-Vis diffuse reflectance measurements showed band gap energy of 3.75 eV and a high degree of optical transparency (90%) in the 100-500 nm thick ITO films. X-ray photoelectron spectroscopy core level binding energies for In 3d(5/2) (443.6 eV), Sn 3d(5/2) (485.6 eV) and Mn 2p(3/2) (640.2 eV) indicated the In3+, Sn4+ and Mn2+ oxidation states. Magnetic hysteresis loops recorded at 300 K yield a coercivity H-c similar to 80 Oe and saturation magnetization M-s similar to 0.39 mu(B)/Mn2+ ion. High-temperature magnetometry showed a Curie temperature T-c > 600 K for the 3.2% Mn doped ITO film.

Item Type: Article
Subjects: Engineering Materials
Divisions: Sol Gel
Depositing User: Namita Dutta
Date Deposited: 01 Feb 2012 12:43
Last Modified: 23 Nov 2012 10:55

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