Indian Journal of Science and Technology
Year: 2016, Volume: 9, Issue: 27, Pages: 1-10
Shivani Malhotra1 *, Mansi Chitkara2 , Inderjeet Singh Sandhu2 , Naini Dawar1 and Jaspreet Singh1
1 School of Electronics and Electrical Engineering, [email protected]
2 Nanomaterial Research Laboratory, [email protected]
*Author for correspondence
School of Electronics and Electrical Engineering,
Email: [email protected]
Background/Objectives: Microwave absorbing materials can be used to reduce electro- magnetic interference. M-type hexaferrites (SrFe12O19 and BaFe12O19) have attracted intensive attention on account of their important applications in microwave absorbing materials. Methods/Statistical Analysis: M-type hexaferrite nanoparticles with a composition of TbxSr1-xFe12O19 (x = 0–0.1) were amalgamted by a chemical method known as co-precipitation method. A successive solid state reaction at different calcination temperatures at fixed holding time has lead to the formation of pure and Tb substituted strontium hexaferrite. The reaction of swaping of Tb cations on the magnetic, structural, and electrical properties of nanoparticles was characterized by X-ray diffraction XRD, FTIR,TEM and VSM. Findings: Microstructure by TEM showed that grains are of extremely fine phase. Identification by XRD confers the single-phase material of nanometeric size. Evaluation on magnetic characteristics for the material showed that coercivity decreased progressively with substitution of Tb3+ ion. Although this was followed by a significant increase in total magnetization. Reflection loss and reflection coefficient and loss tangent for a range of 1-5 KHz were derived which confirms that the material can be considered for high frequency applications.
Keywords: Dielectric Properties, Hexaferrites, Microwave Absorbers, Reflection Loss
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