Structural, magnetic and microwave properties of barium hexaferrite thick films with different Fe/Ba mole ratio

Samiksha Verma; S. K. Dhawan; Andrea Paesano; O. P. Pandey; Puneet Sharma

doi:10.1016/j.jmmm.2015.08.049

Structural, magnetic and microwave properties of barium hexaferrite thick films with different Fe/Ba mole ratio

Samiksha Verma
, S. K. Dhawan
, Andrea Paesano
, O. P. Pandey
, Puneet Sharma

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Barium hexaferrite (BaFe₁₂O₁₉) thick films (∼60 μm) with different BaO·xFe₂O₃ 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 Mössbauer spectroscopy. Vacancy fraction found to be higher at 4f₁, 4f₂ 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 H_a 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.

Original language	English
Pages (from-to)	308-312
Number of pages	5
Journal	Journal of Magnetism and Magnetic Materials
Volume	396
DOIs	https://doi.org/10.1016/j.jmmm.2015.08.049
State	Published - 15 Dec 2015
Externally published	Yes

Keywords

Barium hexaferrite
Fe/Ba mole ratio
Magnetic properties
Microwave absorption
Screen printing

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10.1016/j.jmmm.2015.08.049

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@article{df36f7efe73140d98290e605f7d32f76,

title = "Structural, magnetic and microwave properties of barium hexaferrite thick films with different Fe/Ba mole ratio",

abstract = "Barium hexaferrite (BaFe12O19) thick films (∼60 μm) with different BaO·xFe2O3 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 M{\"o}ssbauer spectroscopy. Vacancy fraction found to be higher at 4f1, 4f2 and 2b sites for mole ratio 5.5 and 5.0 respectively. Magnetic measurement shows that the magnetization (M) and magnetocrystalline anisotropy field (Ha) depends upon mole ratio. M and Ha are found to be maximum for mole ratio 5.5, while the coercivity (Hc) remains constant. Reflection losses (RL) 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.",

keywords = "Barium hexaferrite, Fe/Ba mole ratio, Magnetic properties, Microwave absorption, Screen printing",

author = "Samiksha Verma and Dhawan, \{S. K.\} and Andrea Paesano and Pandey, \{O. P.\} and Puneet Sharma",

year = "2015",

month = dec,

day = "15",

doi = "10.1016/j.jmmm.2015.08.049",

language = "English",

volume = "396",

pages = "308--312",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Structural, magnetic and microwave properties of barium hexaferrite thick films with different Fe/Ba mole ratio

AU - Verma, Samiksha

AU - Dhawan, S. K.

AU - Paesano, Andrea

AU - Pandey, O. P.

AU - Sharma, Puneet

PY - 2015/12/15

Y1 - 2015/12/15

N2 - Barium hexaferrite (BaFe12O19) thick films (∼60 μm) with different BaO·xFe2O3 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 Mössbauer spectroscopy. Vacancy fraction found to be higher at 4f1, 4f2 and 2b sites for mole ratio 5.5 and 5.0 respectively. Magnetic measurement shows that the magnetization (M) and magnetocrystalline anisotropy field (Ha) depends upon mole ratio. M and Ha are found to be maximum for mole ratio 5.5, while the coercivity (Hc) remains constant. Reflection losses (RL) 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.

AB - Barium hexaferrite (BaFe12O19) thick films (∼60 μm) with different BaO·xFe2O3 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 Mössbauer spectroscopy. Vacancy fraction found to be higher at 4f1, 4f2 and 2b sites for mole ratio 5.5 and 5.0 respectively. Magnetic measurement shows that the magnetization (M) and magnetocrystalline anisotropy field (Ha) depends upon mole ratio. M and Ha are found to be maximum for mole ratio 5.5, while the coercivity (Hc) remains constant. Reflection losses (RL) 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.

KW - Barium hexaferrite

KW - Fe/Ba mole ratio

KW - Magnetic properties

KW - Microwave absorption

KW - Screen printing

UR - https://www.scopus.com/pages/publications/84940528484

U2 - 10.1016/j.jmmm.2015.08.049

DO - 10.1016/j.jmmm.2015.08.049

M3 - Article

AN - SCOPUS:84940528484

SN - 0304-8853

VL - 396

SP - 308

EP - 312

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

ER -

Structural, magnetic and microwave properties of barium hexaferrite thick films with different Fe/Ba mole ratio

Abstract

Keywords

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