Verma, Samiksha and Dhawan, S. K. and Paesano Jr, Andrea and Pandey, O. P. and Sharma, Puneet (2015) Structural, magnetic and microwave properties of barium hexaferrite thick films with different Fe/Ba mole ratio. Journal of Magnetism and Magnetic Materials, 396. 308-312 . ISSN 0304-8853

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Barium hexaferrite (BaFe12O19) thick films (similar to 60 mu m) with different BaO center dot xFe(2)O(3) mole ratio (x=5.0-6.0) were prepared by screen printing method. X-ray diffraction analysis confirmed the formation of single phase BaFe12O19 (BaM). Preferential site occupation of Fe3+ ion at five different crystallographic sites, with varied mole ratio was measured by Mossbauer spectroscopy. Vacancy fraction found to be higher at 4f(1), 4f(2) and 2b sites for mole ratio 5.5 and 5.0 respectively. Magnetic measurement shows that the magnetization (M) and magnetocrystalline anisotropy field (H-a) depends upon mole ratio. M and Ha are found to be maximum for mole ratio 5.5, while the coercivity (H-c) remains constant. Reflection losses (R-L) in the frequency range of 12-18 GHz were also studied. Present investigation demonstrates the effect of mole ratio on structural, magnetic and microwave absorption properties of BaM thick films for microwave device applications.

Item Type: Article
Uncontrolled Keywords: Fe/Ba moleratio Barium hexaferrite Screen printing Magnetic properties Microwaveabsorption
Subjects: Materials Science
Applied Physics/Condensed Matter
Depositing User: Dr. Rajpal Walke
Date Deposited: 20 Oct 2016 11:43
Last Modified: 20 Oct 2016 11:43

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