Journal
JOURNAL OF APPLIED PHYSICS
Volume 115, Issue 17, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4866232
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In current research work, Co1-xNix/2Srx/2Fe2O4 (x = 0-1 in a step of 0.2) ferrite nanoparticles were synthesized by a sol-gel method. According to the evolution in the subspectral areas obtained from Mossbauer spectroscopy, it was found that the relaxing iron belongs mostly to the site B, since the Mossbauer fraction of site A does not vary appreciably. With an increase in Ni-Sr substitution contents in cobalt ferrite, the coercivity and saturation of magnetization decrease. Variation of reflection loss versus frequency in microwave X-band demonstrates that the reflection peak shifts to lower frequency by adding substituted cations and the synthesized nanoparticles can be considered for application in electromagnetic wave absorber technology. (C) 2014 AIP Publishing LLC.
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