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|Title:||Magnetic and anomalous dielectric behavior of Mn modified Ba2Mg2Fe12O22 hexaferrite|
|Authors:||Abdullah, Md. F.|
Vishwakarma, P. N.
Singh, A. K.
Anomalous dielectric behavior
|Citation:||International conference on Magnetic Material and Application (ICMAGMA 2018), Bhubaneswar, India, 9-13 December, 2018|
|Abstract:||We have investigated structural, dielectric, magnetic and magnetoelectric (ME) properties of Ba2Mg2(Fe1-xMnx)12O22 (x=0, 0.04, 0.08) hexaferrite. Rietveld refinement of X-ray data confirms the phase purity with rhombohedral crystal structure (R-3m space group). An anomalous behaviour of fitted parameters obtained from dielectric and impedance spectroscopy near Tc (Curie temperature) is explained in terms of MaxwellWagner interfacial polarization effect. Mn substitution causes a substantial decrease in Tc from 647 K (parent sample) to 623 K (4% Mn doped) which is due to modification in super exchange angle of Fe at octahedral sites. Our results confirm the decrease in magnetocrystalline anisotropy constant (K) by ~54% and coercive field (Hc) by ~12 % due to formation of Bloch wall upon Mn doping. Evidence of ME coupling at room temperature is reported in all Mn doped samples.|
|Description:||Copyright of this document belongs to proceedings publisher.|
|Appears in Collections:||Conference Papers|
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|2018_ICMAGMA_MFAbdullah_MagneticAnomalous.pdf||Poster presentation||1.49 MB||Adobe PDF||View/Open Request a copy|
|2018_ICMAGMA_MFAbdullah_MagneticAnomalous_Abs.pdf||Abstract||464.03 kB||Adobe PDF||View/Open Request a copy|
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