Investigations on structural and magnetic properties of M-type hexagonal ferrite Ba0.5Sr0.5CoxLaxFe12−2xO19 in X-band

Gujral, Shally; Bhatia, Kamaljit Singh; Singh, Harjitpal; Kaur, Harmeet; Gupta, Nancy

doi:10.1007/s10854-020-05074-z

Cited by 4 publications

(3 citation statements)

References 22 publications

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“…This doping level exhibits an EAB of 4.20 GHz and an RL min of −56.12 dB@16.1 GHz. Notably, this RL min value outperforms those reported for other ion‐doped BaM ferrite materials, such as Ba 0.5 Sr 0.5 Co x In x Fe 12−2x O 19 (−32.15 dB@12.4 GHz), Ba 0.5 Sr 0.5 Co x La x Fe 12‐2x O 19 (−43.73 dB@10.75 GHz) and Co‐doped BaFe 12 O 19 (−16 dB@17 GHz) 32–34 . The improvement in microwave absorbing properties resulting from Mo 6+ doping can be attributed to an increase in Fe 2+ in the ferrite.…”

Section: Resultsmentioning

confidence: 55%

“…Notably, this RL min value outperforms those reported for other ion-doped BaM ferrite materials, such as Ba 0.5 Sr 0.5 Co x In x Fe 12−2x O 19 (−32.15 dB@12.4 GHz), Ba 0.5 Sr 0.5 Co x La x Fe 12-2x O 19 (−43.73 dB@10.75 GHz) and Co-doped BaFe 12 O 19 (−16 dB@17 GHz). [32][33][34] The improvement in microwave absorbing properties resulting from Mo 6+ doping can be attributed to an increase in Fe 2+ in the ferrite. Firstly, Fe 2+ ions induce charge transfer in Fe 2+ -Fe 3+ , potentially leading to polarization arising from the local displacement of electrons in the direction of the electric field, thereby increasing the dielectric constant and dielectric loss.…”

Section: Resultsmentioning

confidence: 99%

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Molybdenum substituted M‐type hexagonal barium ferrite for high microwave absorption performance

Wu,

Dong,

et al. 2023

Int J Applied Ceramic Tech

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With the advancement of electrical and electronic devices, overcoming electromagnetic pollution turns into an urgent problem. In this work, high‐valence molybdenum (Mo6+) was doped into M‐type hexagonal barium ferrite (BaFe12‐xMoxO19) to improve its electromagnetic performance. The relationship between the Mo6+ doping concentration and the crystallographic structure, morphology and electromagnetic properties was studied in detail. Structural characterizations authenticate that the Mo6+ ions prefer the 2b site, increasing the lattice values and grain size, and boosting more Fe3+ conversion into Fe2+. The magnetic hysteresis loops demonstrate a reduction of saturation magnetization and coercivity values with the increase of Mo6+ concentration. While the microwave absorption properties were obviously improved by the doping Mo6+, and obtained the highest RLmin value of ‐56.12 dB@16.1GHz and effective absorption bandwidth of 4.2 GHz at x = 0.1, displaying a potential role in absorbing material.This article is protected by copyright. All rights reserved

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Section: Resultsmentioning

confidence: 55%

Section: Resultsmentioning

confidence: 99%

Molybdenum substituted M‐type hexagonal barium ferrite for high microwave absorption performance

Wu,

Dong,

et al. 2023

Int J Applied Ceramic Tech

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“…These are named as weighing, mixing, grinding, drying, pre-sintering, crushing of powder in a pestle mortar and sieving of powder using sieves with a mesh size of 220 B.S.S. Moreover, the ltered powder is mixed with PVA binder and then the pallet is prepared using a hydraulic press of 75 KN/m 2 uniaxial pressure [29,30]. The nal sintering is done at a temperature of 1100 o C. Then, some characterization techniques are used to investigate the structural, electric and magnetic properties of the designed substrate to observe its suitability in X-band.…”

Section: Lanthanum Doped Ba-sr Hexagonal Ferrite As a Substratementioning

confidence: 99%

Bandwidth Enhancement of Cross-Shaped Fractal Antenna Using Lanthanum Doped Ba-Sr Hexagonal Ferrite As Substrate Material For X-Band Applications

Gujral

Singh

et al. 2021

Preprint

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This paper analyzes and compares the performance of a proposed cross-shaped fractal antenna design with two different substrate materials FR4 epoxy and lanthanum doped Ba-Sr hexagonal ferrite in X-band, where the lanthanum doped Ba-Sr hexagonal ferrite substrate is synthesized based on solid-state reaction method. The proposed antenna design is simulated using HFSS (High frequency structure simulator) version 15. The antenna is intended to work at 10 GHz frequency and involves four iterations. The antenna design is optimized for significant performance parameters viz. return loss, bandwidth, and gain. It provides better results with ferrite substrate as compared to FR4 epoxy substrate and provides − 10 dB broad bandwidth in three frequency regions 6.2969-6.4 GHz, 7.8702-9.44 GHz, and 9.68-9.7746 GHz. The prototype of proposed antenna with FR4 epoxy substrate is fabricated and tested to attain experimental results. The measured results are in good liaison with simulated results. This antenna structure can be considered suitable for RADAR, satellite, microwave communication, and weather forecasting applications in X-Band.

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Influence of Co-In Doping in M-Type Barium–Strontium Hexagonal Ferrite on Microwave Absorption

Kaur

Bhatia

Tewari

et al. 2022

J. Electron. Mater.

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Investigations on structural and magnetic properties of M-type hexagonal ferrite Ba0.5Sr0.5CoxLaxFe12−2xO19 in X-band

Cited by 4 publications

References 22 publications

Molybdenum substituted M‐type hexagonal barium ferrite for high microwave absorption performance

Molybdenum substituted M‐type hexagonal barium ferrite for high microwave absorption performance

Bandwidth Enhancement of Cross-Shaped Fractal Antenna Using Lanthanum Doped Ba-Sr Hexagonal Ferrite As Substrate Material For X-Band Applications

Influence of Co-In Doping in M-Type Barium–Strontium Hexagonal Ferrite on Microwave Absorption

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