Effect of Non-Ionic Surfactant Concentration on Microstructure, Magnetic and Dielectric Properties of Strontium-Copper Hexaferrite Powder

Abstract:

Strontium copper hexaferrite powder with composition Sr₂Cu₂Fe₁₂O₂₂ was synthesized in presence of a non-ionic surfactant Tween-80 using chemical co-precipitation route. The prepared samples were calcinated at 950 oC for 4 hrs in a furnace and then slowly cooled to room temperature to obtain Sr2Cu2Fe12O22 hexaferrite powder. The effect of surfactant concentration on phase formation, microstructure, magnetic and dielectric properties of Sr₂Cu₂Fe₁₂O₂₂ were investigated using XRD, SEM, TEM, VSM, dielectric and low field AC susceptibility measurement techniques. The XRD analysis reveals the formation of mixed phases of Y and M type hexaferrites. The synthesized samples exhibited magnetic properties typical for soft magnetic materials, with saturation magnetization typical for Y-type hexaferrites. The dielectric properties were studied within the frequency range 100 H_Z to 2 MHz. SEM images show formation of non-uniform, spongy and porous structure. The low field AC susceptibility measurements indicate that formed Sr-Cu hexaferrite powder possesses ferrimagnetic to paramagnetic transition at Curie temperature.

• Periodical: Solid State Phenomena (Volume 232)
• Pages: 93-110
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.232.93
• Online since: June 2015
• Authors: Reshma A. Nandotaria, Chetna C. Chauhan, Rajshree B. Jotania
• Keywords: Curie Temperature, Microstructure, Non-Ionic Surfactant - Tween 80, SEM-TEM Characterization, Sr-Cu Hexaferrite Powder

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