Transparent and high conductive molybdenum doped indium oxide (IMO) thin films have been deposited on glass substrates by activated reactive evaporation. The effect of substrate temperature on the structure, surface morphology, electrical, optical and photoluminescence properties of these films were systematically examined and it was found that crystallinity and growth orientation of the films were significantly influenced by substrate temperature. In addition the films exhibited a low electrical resistivity of 5.2 × 10-4 Ω cm with an optical transmittance 90% in the visible region of the solar spectrum at a substrate temperature of 573 K. Intensive blue PL bands at 415 and 440 nm were observed in the photoluminescence spectrum at room temperature. © 2008 Elsevier Ltd. All rights reserved.

Shaik Kaleemulla

Department of Physics

School of Advanced Sciences

Vellore Campus

Sivasankar Reddy A

Uthanna S

Sreedhara Reddy P.

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Vacuum

Fe-substituted NiO nanoparticles (Ni1−xFexO2) (x= 0.00, 0.03, 0.05, 0.07, and 0.09) were synthesised using ball-milling method followed by vacuum sintering and studied for their microstructural and magnetic properties. All the samples show a cubic structure with a crystallite size of 17–26 nm. Secondary phases related to Fe2O3 were identified from XRD, indicating that the observed ferromagnetism may be due to the dopants. The doping of Fe ions does not cause any significant variation in the crystal structure. The pure NiO nanoparticles were weak ferromagnetic in nature, and Fe-doped NiO nanoparticles exhibit room temperature ferromagnetism. The strength of magnetization increased from 0.57 to 0.94 emu/g with an increase of Fe concentration from 3 to 7 at.%, respectively. A high coercive field of 173 Oe was observed for the Ni1−xFexO2 nanoparticles at x= 0.09. The results and the process of development of ferromagnetism at room temperature in the Ni1−xFexO2 nanoparticles were presented and discussed in detail. © 2018, Springer Science+Business Media, LLC, part of Springer Nature.

Journal of Superconductivity and Novel Magnetism

Effect of Fe Substitution on Microstructure and Magnetic Properties of Ni1−xFexO2 Nanoparticles

Magnetic, magnetoresistivity and superconductivity studies were carried out on (In1-xFex)2O3 (x = 0.00, 0.03, 0.05 and 0.07) thin films (2D structures) grown on glass substrate by electron beam evaporation technique at 350 C. The films have an average size of 120 nm particles. All the samples shown soft ferromagnetic hysteresis loops at room temperature and saturation magnetization increased with iron dopant concentration. Observed magnetization could be best interpreted by F-center mediated magnetic exchange interaction in the samples. Temperature dependent resistivity of the sample (x = 0.00 and 0.07) showed metallic behavior down to very low temperatures and superconductivity at 2 K for undoped In2O3 whereas the In1.86Fe0.14O3 sample shows superconductivity below 2 K in the absence of magnetic fields. The reduction in transition temperature was attributed to increase electrical disorder with iron doping. Both samples showed positive magnetoresistivity (MR) in superconducting state due to increase of resistivity resulting from breaking of superconducting Cooper pairs upon application of magnetic field. In addition, both the samples show feeble negative MR in normal electrical state. The observed MR in normal state is not due to spin polarized tunneling instead it is due to suppression of scattering of charge carrier by single occupied localized states. © 2015 Elsevier B.V. All rights reserved.

Journal of Alloys and Compounds

Magnetic and superconductivity studies on (In1−Fe )2O3 thin films

The optically transparent conducting molybdenum-doped indium oxide thin films (In2O3:Mo) were prepared on glass substrates by an activated reactive evaporation method and the influence of molybdenum doping levels on the electrical and optical properties of the films had been investigated systematically. The films, synthesized at a substrate temperature of 573 K and a Mo-doping level of 3 at.%, exhibited a minimum electrical resistivity of 5.2 × 10-4 Ω cm and an average optical transmittance of 90% in the visible region with a band gap of 3.68 eV. © 2010 Elsevier B.V. All rights reserved.

Electrical and optical properties of In2O3:Mo thin films prepared at various Mo-doping levels

Polycrystalline cubic In2O3 thin films were deposited on the normal glass substrates by activated reactive evaporation method and systematically investigated the influence of oxygen partial pressure on the structural, optical, electrical and photoluminescence properties of the films. X-ray diffraction studies revealed that the films formed at oxygen partial pressure of 2 × 10-3 mbar were nearly stoichiometric. The films formed at an oxygen partial pressure of 2 × 10-3 mbar exhibited the electrical resistivity of 8.2 × 10-4 Ω cm, optical transmittance of 87% and the optical band gap of 3.62 eV. Two distinct emission peaks in the photoluminescence spectrum were observed at 415 and 440 nm in the visible region of the solar spectrum. © 2009 Elsevier B.V. All rights reserved.

Fulltext

Physical properties of In2O3 thin films prepared at various oxygen partial pressures

Thin Solid Films

Transparent conductive In2O3:Mo thin films prepared by reactive direct current magnetron sputtering at room temperature

Oncogene

Short-term induction and long-term suppression of HPV16 oncogene silencing by RNA interference in cervical cancer cells

Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films

Properties of transparent conductive In2O3:Mo thin films deposited by Channel Spark Ablation

Physica B: Condensed Matter

Structural, electrical and optical properties of In2O3:Mo films deposited by spray pyrolysis

Properties of multilayer transparent conducting oxide films

Effect of substrate temperature on the physical properties of In2O3:Mo films: Prepared by an activated reactive evaporation

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ISSN	0042-207X
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