Permeability Spectral Analysis and Determination of Microstructural Parameters for Mn 0.7+x Zn 0.3 Si x Fe 2-2x O 4 Seri
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ORIGINAL PAPER
Permeability Spectral Analysis and Determination of Microstructural Parameters for Mn0.7+xZn0.3SixFe2-2xO4 Series K. G. Saija 1 & P. Y. Raval 2
&
N. P. Joshi 2 & A. R. Makadiya 2 & C. R. Kathad 3 & S. K. Modi 4 & N. H. Vasoya 5 & K. B. Modi 2
Received: 22 June 2020 / Accepted: 7 August 2020 # Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract In this communication, the compositional dependence of the real part (μ′) and an imaginary part (μ″) of complex permeability for polycrystalline compositions of ferrite series, Mn0.7+xZn0.3SixFe2-2xO4 (x = 0.1–0.3), over the wide frequency and temperature ranges has been discussed. The μ′ decrease with Mn-Si concentration (x) is mainly due to the reduction in saturation magnetization (Ms) and average grain size (D). The D decreases due to smaller solid solubility in the spinel structure and segregation of SiO2 at grain boundaries. The μ′( f ) plots at 300 K show a relaxed type of spectra. The observed maximum in the vicinity of Neel temperature in μ′(T) curves is due to the relative rate of change of anisotropy constant and Ms values, whereas in μ″(T) plots it is because of the domain wall damping. The derived microstructural parameters related to grain structure have been discussed in a systematic manner. Keywords Spinel ferrite . Permeability spectra . Microstructural parameters
1 Introduction The need for magnetic materials suitable for high-frequency applications such as inductors, deflection yokes, loading and choke coils, transformers, splitters, electromagnetic interference, and antenna rods increases day by day. In modern technology, such devices fulfill the basic requirements. The high values of saturation magnetization, resistivity, dielectric permittivity, initial permeability, and low power loss/eddy current loss, etc. are the primary requirements for any materials likely to employ for such applications. The spinel structured ferrites are only the materials that possess such characteristics to a more or lesser extent. Not only that, but magnetic ferrites
* P. Y. Raval [email protected] 1
Smt. R.P. Bhalodia Mahila College, Upleta 360490, India
2
Department of Physics, Saurashtra University, Rajkot 360005, India
3
Department of Physics, Government Polytechnic, Porbandar 360577, India
4
Department of Civil Engineering, Government Engineering College, Rajkot 360005, India
5
Department of Balbhavan, Children’s University, Sector-20, Gandhinagar 382021, India
also have other advantages like easy preparation, economical, the possibility of tonnage production, and reproducibility [1]. While evaluating the performance of magnetic materials, permeability is referred to as one of the most essential parameters. It is affected by numerous factors such as chemical composition, stress, temperature, frequency crystal structure, and magnetization [1]. The overlaying of two distinct actions responsible for magnetization, rotation of the spin, and motion of the domain wall describe the permeability of polycrystalline ferr
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