1G.G.M. Science College, Canal Road, Jammu (J&K) 180001, India
2National Physical Laboratory, Council of Scientific and Industrial Research, Dr. K.S. Krishnan Road, New Delhi 110012, India
Adv. Mater. Lett., 2012, Current Issue, 3 (5), pp 399-405
DOI: 10.5185/amlett.2011.7288
Publication Date (Web): Sep 16, 2012
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E-mail: aks@nplindia.ernet.in
Gd3+ ions substituted in Ni0.5Zn0.5GdxFe2-xO4 (where x = 0.1, 0.2, 0.3) ferrite nanoparticles in the size range from 15 to 25 nm were prepared by chemical method. The effect of Gd3+ ions in spinel structure in correlation to structural and magnetic properties have been studied in detail using XRD, HRTEM and EPR techniques. The spin resonance confirms the ferromagnetic behaviour of these nanoparticles and higher order of dipolar-dipolar interaction. On increasing Gd3+ ions concentrations, the super exchange interaction i.e. increase in movement of electron among Gd3+ - O - Fe3+ in the core group and the spin biasing in the glass layer has been interpreted. The decrease in ‘g’ value and increase in relaxation time is well correlated with the change of particle size on different concentrations of Gd3+ ions in Ni-Zn ferrite.
Spinel ferrite, nanoparticles, HRTEM, EPR, g Ã,¢,â,&sbquo,¬,â,&euro,&oelig, value, resonance field, line width.
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