Enhanced Microwave Absorption Properties of Doped M-Type Barium Hexagonal Ferrites in Ka-band Frequencies

Journal Article · Thu Aug 15 04:00:00 EDT 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-019-5044-1· OSTI ID:22922922

Arora, Amit; Pubby, Kunal ^[1]

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1. Guru Nanak Dev University, Department of Electronics Technology (India)

The present study reports the microwave absorption characteristics of La{sup 3+}-Na{sup +} substituted barium hexaferrites with chemical composition: Ba{sub (1−2x)}La{sub x}Na{sub x}Fe{sub 10}CoTiO{sub 19} and Ba{sub (1−2x)}La{sub x}Na{sub x}Fe{sub 10}Co{sub 0.5}TiMn{sub 0.5}O{sub 19} (0.00 ≤ x ≤ 0.25) respectively in Ka-band frequencies. The electromagnetic characteristics such as complex permittivity, complex permeability, and microwave absorption properties were studied using Vector Network Analyzer in 26.5–40.0 GHz frequency band. Dielectric properties showed almost constant variation with increase in frequency. Magnetic permeability spectra observed wavy variation with frequency. Comparing the electromagnetic properties of two series, it is observed that Co–Ti–Mn series observes higher values of electromagnetic properties in comparison to Co–Ti series. For composition x = 0.15 of Ba{sub (1−2x)}La{sub x}Na{sub x}Fe{sub 10}Co{sub 0.5}TiMn{sub 0.5}O{sub 19} series, −55.33 dB reflection loss at 30 GHz frequency with −10 dB absorption bandwidth around 3.51 GHz has been observed. Thus, these materials can be employed as effective absorbers for Ka-band microwave absorbers.

• OSTI ID: 22922922
• Journal Information: Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 8 Vol. 32; ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION
BARIUM COMPOUNDS
COBALT COMPOUNDS
COMPARATIVE EVALUATIONS
DOPED MATERIALS
FERRITES
LANTHANUM ADDITIONS
MAGNETIC SUSCEPTIBILITY
MANGANESE COMPOUNDS
MICROWAVE RADIATION
PERMITTIVITY
REFLECTION
SODIUM ADDITIONS
SPECTRA
TITANIUM COMPOUNDS