期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 372, 期 -, 页码 79-85出版社
ELSEVIER
DOI: 10.1016/j.jmmm.2014.07.057
关键词
ZnO; Chemical synthesis; X-ray diffraction; Infrared spectroscopy; Crystal structure; Electronic paramagnetic resonance
资金
- UGC DRS LEVEL III [F.530/1/DRS/2009]
- DST FIST [DST/FIST/PSI - 002/2011]
Structural, magnetic and optical properties of undoped and Ni2+ doped ZnO nanopowders have been prepared by sonochemical assistance. Powder XRD studies confirm the hexagonal structure of both undoped and Ni2+ doped of ZnO nanopowders and its average crystallite sizes are evaluated. Optical absorption and Electron Paramagnetic Resonance spectral data confirmed the site symmetry for Ni2+ ions as octahedral. Photoluminescence spectra exhibited the emission bands in ultraviolet and blue regions at an excitation wavelength of 328 nm. FT-IR spectra showed the characteristic vibrational bands of Zn-O. Vibrating sample magnetometer was used for the magnetic property investigations and indicates room temperature ferromagnetism which is intrinsic in nature and attributed to oxygen and/or Zn deficiencies. (C) 2014 Elsevier B.V. All rights reserved.
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