Magnetic study of some nanoferrite materials

Authors

• M. K. Shobana ¹

• Center for Advanced Material Technology, Kookmin University, 861-1 Jeongneung-dong, Seongbuk-gu, Seoul 136-702, Republic of Korea.

Abstract

The Mössbauer spectra of nanoferrite materials such as Ni_0.25Mn_0.75Fe₂O_4, Co_0.5Mn_0.5Fe₂O₄ and Ni_0.4Co_0.6Fe₂O₄ have been reported and the above materials were prepared by sol-gel combustion method using metal nitrates as source material and Polyvinyl alcohol(PVA) as agglomeration reducing agent. As the structural, thermal and magnetic properties (VSM) of the above ferrites have been published already, hence, the present paper reports the Mössbauer studies of the nanoferrites. Based on the observed values of hyperfine parameter such as Isomer shift (IS), Quadrupole splitting (QS) and hyperfine field values, the distribution of ion and structure of the ferrites has been reported.  

Keywords

• Nanoferrites
• Isomer shift
• Quadrupole shift
• Spinel structure