Enhancement of Magnetic Properties in Co-Sr Ferrite Nano Composites Prepared by an SHS Route

Abstract:

The preparation and characterization of composite materials containing nanometer-sized constituents is currently a very active and exciting area of research at laboratories around the world. In order to improve the magnetic and electromagnetic absorption properties of magnetic materials, composite of soft/hard ferrite is required in proper composition. For high-density magnetic recording, decrease in the coercive field and simultaneously increase in saturation magnetization has attracted much attention. To achieve these properties, new modified CoFe₂O₄-SrFe₁₂O₁₉ composite ferrite nanoparticles were prepared by using an SHS route. Composites of spinel: hexaferrite were prepared in the ratio 1:0, 1:2 and 0:1. The enhancement of maximum energy product BH_max is achieved by the addition of Spinel ferrite into M-type hexaferrite particles. The exchange interactions between hard and soft magnetic phases improve the microwave absorption properties. The parameters, H_c, σ_s, and particle size d, can easily be controlled by changing the content of spinel ferrite in the composite with Sr-M hexaferrite.

• Periodical: Solid State Phenomena (Volume 209)
• Pages: 164-168
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.209.164
• Online since: November 2013
• Authors: Nital R. Panchal, Rajshree B. Jotania
• Keywords: Co-Sr Nano Composites, Magnetic Property, SHS Route

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