Structural, magnetic and microwave properties of barium hexaferrite thick films with different Fe/Ba mole ratio
IR@NPL: CSIR-National Physical Laboratory, New Delhi
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Title |
Structural, magnetic and microwave properties of barium hexaferrite thick films with different Fe/Ba mole ratio
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Creator |
Verma, Samiksha
Dhawan, S. K. Paesano Jr, Andrea Pandey, O. P. Sharma, Puneet |
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Subject |
Materials Science
Applied Physics/Condensed Matter |
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Description |
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.
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Publisher |
Elsevier
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Date |
2015-12-15
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Type |
Article
PeerReviewed |
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Format |
application/pdf
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Identifier |
http://npl.csircentral.net/2002/1/309.pdf
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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Relation |
http://npl.csircentral.net/2002/
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