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Author Krishna, N. Sai ♦ Kaleemulla, S. ♦ Amarendra, G. ♦ Rao, N. Madhusudhana ♦ Krishnamoorthi, C. ♦ Kuppan, M. ♦ Begam, M. Rigana ♦ Reddy, D. Sreekantha ♦ Omkaram, I.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ ANNEALING ♦ CONCENTRATION RATIO ♦ CUBIC LATTICES ♦ DOPED MATERIALS ♦ EV RANGE ♦ FERROMAGNETISM ♦ FOURIER TRANSFORMATION ♦ INDIUM OXIDES ♦ INFRARED SPECTRA ♦ IRON ♦ MAGNETIC PROPERTIES ♦ MAGNETIC SEMICONDUCTORS ♦ MAGNETIZATION ♦ POLYCRYSTALS ♦ POWDERS ♦ SYNTHESIS ♦ TEMPERATURE RANGE 0273-0400 K ♦ VIBRATING SAMPLE MAGNETOMETERS ♦ X-RAY DIFFRACTION
Abstract Highlights: • Synthesis of Fe doped In{sub 2}O{sub 3} powders using a solid state reaction. • Characterization of the samples using XRD, UV–vis-NIR, FT-IR, and VSM. • All Fe doped In{sub 2}O{sub 3} powders exhibited the cubic structure of In{sub 2}O{sub 3}. • All the Fe doped In{sub 2}O{sub 3} samples exhibited room temperature ferromagnetism. - Abstract: Iron doped indium oxide dilute magnetic semiconductor (In{sub 1−x}Fe{sub x}){sub 2}O{sub 3} (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 (In{sub 1−x}Fe{sub x}){sub 2}O{sub 3} 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 In{sub 2}O{sub 3} is diamagnetic. However, all the Fe-doped In{sub 2}O{sub 3} samples are ferromagnetic. The saturation magnetization (M{sub s}) of ferromagnetic (In{sub 1−x}Fe{sub x}){sub 2}O{sub 3} (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.
ISSN 00255408
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-01-15
Publisher Place United States
Journal Materials Research Bulletin
Volume Number 61


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