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Structural, dielectric and magnetic properties of [formula omitted] composites.

Authors :
Choudhari, Gitesh Ishwarji
Kant, K. Mohan
Source :
Journal of Molecular Structure. Sep2024, Vol. 1311, pN.PAG-N.PAG. 1p.
Publication Year :
2024

Abstract

• Hard/soft magnetic composites were synthesized by physical mixing with different weight percentages. • The synthesized composites were characterized by X-ray diffraction, SQUID Magnetometer, and electrochemical impedance analyzer. • Structural analysis confirms the presence of two phases independently in the composites. • All the prepared composites exhibit single-step hysteresis loops. In this work, Strontium hexaferrite (S r F e 12 O 19) and Cobalt ferrite (C o F e 2 O 4) nanoparticles and their composites (100 − x) S r F e 12 O 19 /x C o F e 2 O 4 were synthesized. X-ray diffraction (XRD), Raman analysis and Fourier transform infrared spectroscopy, were used to investigate the structural properties of the prepared composites. XRD pattern and Rietveld refinement confirm the formation of independent phases, without any secondary phase. Scanning electron microscopy with Energy-Dispersive X-ray spectroscopy were employed to study the morphological characteristic and compositional analysis. The analysis of dielectric behavior was performed over a wide range of temperatures and frequencies, exhibiting increase in dielectric constant in the composite. Magnetic properties have been studied at room temperature by measuring the magnetic hysteresis loop. Hard phased Strontium hexaferrite exhibited a large coercivity of 5.9 kOe, whereas soft phase cobalt ferrite shows a saturation magnetization value of 78.4 emu/g. The law of approach to saturation magnetization is applied for the estimation of magnetic saturation in all the composites and observed to vary from 71.3 emu/g to 72.9 emu/g. All the magnetic composites exhibit single-phase magnetic loops confirming, the exchange coupling in all prepared composites. The presence of exchange coupling in hard/soft composites was studied using d M d H vs H plot. [Display omitted] [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00222860
Volume :
1311
Database :
Academic Search Index
Journal :
Journal of Molecular Structure
Publication Type :
Academic Journal
Accession number :
177757713
Full Text :
https://doi.org/10.1016/j.molstruc.2024.138303