ITO (In0.95Sn0.05)2O3 and Fe doped ITO (In0.90Sn0.05Fe0.05)2O3 nanoparticles were synthesized using standard solid state reaction and characterized by XRD, Raman and FT-IR studies, UV-Vis-NIR spectrophotometer and vibrating sample magnetometer for structural, optical and magnetic properties.The XRD patterns revealed the formation of nanocrystalline particles with cubic bixbyte crystal structure. The Raman spectra show that the nanoparticles are free of secondary crystalline phase.From FT-IR studies it was found that the bonds observed were due to In2O3 and no new peaks were found in FT-IR spectra. This clearly indicatesthat Fe ions are incorporate into the host In2O3 structure and does not alter the crystal structure of In2O3 host material. The undoped ITO nanoparticles exhibited room temperature ferromagnetism with clear hysteresis curve having coercive field of 683 G whereas the same ITO nanoparticles exhibited coercive field of 150 G at 100 K. © 2016 Author(s).

Shaik Kaleemulla

Department of Physics

School of Advanced Sciences

Vellore Campus

Krishnamoorthi C

Babu S.H

Krishna N.S

Rao N.M

Joshi G.M

Omkaram I

Reddy D.S.

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.

&nbsp;

&nbsp;

VIT University

Raman and FT-IR studies of (In0.90Sn0.05Fe0.05)2O3 nanoparticles

AIP Conference Proceedings

Iron doped indium oxide dilute magnetic semiconductor (In1-xFex)2O3 (x = 0.00, 0.03, 0.05, and 0.07) powders were synthesized by standard solid state reaction method followed by vacuum annealing. The effect of Fe concentration on structural, optical, and magnetic properties of the (In1-xFex)2O3 powders have been systematically studied. X-ray diffraction patterns confirmed the polycrystalline cubic structure of all the samples. An optical band gap increases from 3.12 eV to 3.16 eV while Fe concentration varying from 0.03 to 0.07. Magnetic studies reveal that virgin/undoped In2O3 is diamagnetic. However, all the Fe-doped In2O3 samples are ferromagnetic. The saturation magnetization (Ms) of ferromagnetic (In1-xFex)2O3 (x = 0.03, 0.05, and 0.07) samples increases from 11.56 memu/g to 148.64 memu/g with x = 0.03-0.07. The observed ferromagnetism in these samples was attributed to magnetic nature of the dopant (Fe) as well as defects created in the samples during vacuum annealing. © 2014 Elsevier Ltd. All rights reserved.

Materials Research Bulletin

Structural, optical, and magnetic properties of Fe doped In2O3 powders

Iron-doped SnO 2 diluted magnetic semiconducting powders (Sn 1-x Fe x O 2 , x=0.00, 0.03, 0.05, 0.07, 0.10, and 0.15) were synthesized by a simple solid state reaction followed by vacuum annealing and studied the effect of Fe dopant concentrations on structural, optical, and magnetic properties of the synthesized samples. From the X-ray diffraction, it was confirmed that the samples prepared at lower dopant concentrations were tetragonal in structure whereas the samples prepared at higher dopant concentration exhibited orthorhombic SnO and Fe 2 O 3 phases along with tetragonal SnO 2 structure. FT-IR spectrum has been used to confirm the formation of Sn-O bond. The optical band gap of the Sn 1-x Fe x O 2 powders was increased from 3.6 eV to 3.7 eV with increase of dopant concentration. Raman spectroscopy measurement revealed that the broadening of the most intense Raman peak observed at 630 cm -1 with Fe doping, conforming that the Fe ions are substituted at the Sn sites in the SnO 2 lattice. Vibrating sample magnetometer measurements confirmed that the Sn 1-x Fe x O 2 powders were ferromagnetic at room temperature. © 2013 Springer Science+Business Media New York.

Journal of Superconductivity and Novel Magnetism

Physical Properties of Sn1−x Fe x O2 Powders Using Solid State Reaction

Nickel-doped indium oxide diluted magnetic semiconducting powders ((In 1-xNix)2O3, x=0.00, 0.03, 0.05, 0.07 and 0.09) were synthesized by a simple solid state reaction followed by vacuum annealing. Structural, optical and magnetic properties of (In 1-xNix)2O3 powders were studied as a function of doped Ni concentration. X-ray diffraction confirmed polycrystalline cubic structures. Decrease in optical band gap from 3.07 eV to 2.99 eV was observed when dopant concentration of Ni was increased from x=0.03 to x=0.07. Vibrating sample magnetometer measurements confirmed that all (In 1-xNix)2O3 powders were ferromagnetic at room temperature. © 2013 Elsevier Ltd. All rights reserved.

Materials Science in Semiconductor Processing

Structural, optical and magnetic properties of (In1−xNix)2O3 (0≤x≤0.09) powders synthesized by solid state reaction

Nickel (Ni) doped SnO2powder samples were prepared using solid-state reaction with dopant concentrations in the range of 3 at.% to 15 at.%. The influence of Ni doping on structural, optical, and magnetic properties of the powder samples has been investigated. All the Ni doped powder samples exhibited tetragonal structure of SnO2. A decrease in optical band gap was observed with increase of Ni doping levels. The vibrating sample magnetometer measurements revealed that the Ni doped SnO2powder samples were ferromagnetic at room temperature.

Fulltext

Advances in Condensed Matter Physics

Structural and Magnetic Properties of Ni DopedSnO2

Synthesis, magnetic and dielectric characterization of nanocrystalline solid solutions of In2−xNixO3 (x=0.05, 0.10 and 0.15)

Journal	AIP Conference Proceedings
Publisher	Author(s)
ISSN	0094243X
Open Access	0