Microwave Absorption Properties of Cobalt-Zirconium Doped Strontium Hexaferrites in Ku-Frequency Band

Journal Article · Fri Dec 15 04:00:00 EST 2017 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-017-4141-2· OSTI ID:22771748

Pubby, Kunal; Chawla, S. K.; Kaur, Prabhjyot ^[1]

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1. Guru Nanak Dev University, Department of Chemistry, Centre for Advanced Studies-I (India)

In this article, microwave electromagnetic properties of doped strontium hexaferrites have been investigated in Ku microwave frequency band (12.4–18 GHz), along with their performance as microwave absorbing materials. Vector network analyzer has been used for characterization of cobalt-zirconium substituted strontium hexaferrites Sr(CoZr){sub x}Fe{sub (12−2x)}O{sub 19} (x = 0.0, 0.2, 0.4, 0.6, 0.8, 1.0), synthesized using sol-gel method. Real parts of permittivity and permeability have shown very small variations up to 16 GHz. There has been a dip in spectrum of real part of permittivity and a peak in spectrum of real part of permeability at the same frequency in 16–18 GHz range for every composition. Regarding the electromagnetic wave absorption, all the six prepared compositions have potential (≥90% absorption) for usage in suppressing electromagnetic pollution. The composition with x = 1.0 has achieved the highest −10 dB absorption bandwidth from 15 to 18 GHz frequency. The realization of absorbing materials with maximum absorption is related to the phenomenon of impedance matching and high electromagnetic losses. The correlation of absorption peaks with attenuation constant, wave impedance and complex thickness has also been studied.

• OSTI ID: 22771748
• Journal Information: Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 12 Vol. 30; ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATTENUATION
COBALT
DOPED MATERIALS
FERRITES
GHZ RANGE
IMPEDANCE
MAGNETIC PROPERTIES
MICROWAVE RADIATION
PERMEABILITY
PERMITTIVITY
SOL-GEL PROCESS
SPECTRA
STRONTIUM COMPOUNDS
THICKNESS
ZIRCONIUM