Mössbauer, magnetic and microwave absorption characteristics of substituted W-type hexaferrites nanoparticles

Muhammad Javed Iqbal; Rafaqat Ali Khan; Shigemi Mizukami; Terunobu Miyazaki

doi:10.1016/j.ceramint.2012.01.067

Mössbauer, magnetic and microwave absorption characteristics of substituted W-type hexaferrites nanoparticles

Muhammad Javed Iqbal, Rafaqat Ali Khan, Shigemi Mizukami, Terunobu Miyazaki

Advanced Institute for Materials Research (AIMR)

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

25 Citations (Scopus)

Abstract

W-type hexaferrite nanoparticles of nominal composition BaCo _2-xMn _xFe _16-2yZr _yNi _yO ₂₇ (x = 0-0.5; y = 0-1.0), are synthesized by using the chemical co-precipitation technique. The X-ray diffraction (XRD) data conform to the formation of single phase. Mössbauer analysis reveals that extrinsic substitution of metal ions (Mn _x and Zr _y-Ni _y) takes place at 2d, f _IV, 2b, and 12k sub-lattices. Doped metal substitution up to ionic contents of x = 0.3 and y = 0.6, results in enhancement of the saturation magnetization M _s and remanent magnetization M _r while these substitutions lower the coercivity H _c. The optimum values of the above mentioned three parameters, measured at room temperature, using a vibrating sample magnetometer (VSM), are 79.7 emu g ^-1, 36.0 emu g ^-1 and 1012 Oe, respectively. Microwave absorption characteristics calculated from complex permeability and complex permittivity data retrieved by a vector network analyzer (VNA) increase as the doped metal ions content increases.

Original language	English
Pages (from-to)	4097-4103
Number of pages	7
Journal	Ceramics International
Volume	38
Issue number	5
DOIs	https://doi.org/10.1016/j.ceramint.2012.01.067
Publication status	Published - 2012 Jul

Keywords

A. Powders: chemical preparation
C. Magnetic properties
D. Ferrites
Microwave absorption
Mössbauer spectroscopy

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/j.ceramint.2012.01.067

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title = "M{\"o}ssbauer, magnetic and microwave absorption characteristics of substituted W-type hexaferrites nanoparticles",

abstract = "W-type hexaferrite nanoparticles of nominal composition BaCo 2-xMn xFe 16-2yZr yNi yO 27 (x = 0-0.5; y = 0-1.0), are synthesized by using the chemical co-precipitation technique. The X-ray diffraction (XRD) data conform to the formation of single phase. M{\"o}ssbauer analysis reveals that extrinsic substitution of metal ions (Mn x and Zr y-Ni y) takes place at 2d, f IV, 2b, and 12k sub-lattices. Doped metal substitution up to ionic contents of x = 0.3 and y = 0.6, results in enhancement of the saturation magnetization M s and remanent magnetization M r while these substitutions lower the coercivity H c. The optimum values of the above mentioned three parameters, measured at room temperature, using a vibrating sample magnetometer (VSM), are 79.7 emu g -1, 36.0 emu g -1 and 1012 Oe, respectively. Microwave absorption characteristics calculated from complex permeability and complex permittivity data retrieved by a vector network analyzer (VNA) increase as the doped metal ions content increases.",

keywords = "A. Powders: chemical preparation, C. Magnetic properties, D. Ferrites, Microwave absorption, M{\"o}ssbauer spectroscopy",

author = "Iqbal, {Muhammad Javed} and Khan, {Rafaqat Ali} and Shigemi Mizukami and Terunobu Miyazaki",

year = "2012",

month = jul,

doi = "10.1016/j.ceramint.2012.01.067",

language = "English",

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T1 - Mössbauer, magnetic and microwave absorption characteristics of substituted W-type hexaferrites nanoparticles

AU - Iqbal, Muhammad Javed

AU - Khan, Rafaqat Ali

AU - Mizukami, Shigemi

AU - Miyazaki, Terunobu

PY - 2012/7

Y1 - 2012/7

N2 - W-type hexaferrite nanoparticles of nominal composition BaCo 2-xMn xFe 16-2yZr yNi yO 27 (x = 0-0.5; y = 0-1.0), are synthesized by using the chemical co-precipitation technique. The X-ray diffraction (XRD) data conform to the formation of single phase. Mössbauer analysis reveals that extrinsic substitution of metal ions (Mn x and Zr y-Ni y) takes place at 2d, f IV, 2b, and 12k sub-lattices. Doped metal substitution up to ionic contents of x = 0.3 and y = 0.6, results in enhancement of the saturation magnetization M s and remanent magnetization M r while these substitutions lower the coercivity H c. The optimum values of the above mentioned three parameters, measured at room temperature, using a vibrating sample magnetometer (VSM), are 79.7 emu g -1, 36.0 emu g -1 and 1012 Oe, respectively. Microwave absorption characteristics calculated from complex permeability and complex permittivity data retrieved by a vector network analyzer (VNA) increase as the doped metal ions content increases.

AB - W-type hexaferrite nanoparticles of nominal composition BaCo 2-xMn xFe 16-2yZr yNi yO 27 (x = 0-0.5; y = 0-1.0), are synthesized by using the chemical co-precipitation technique. The X-ray diffraction (XRD) data conform to the formation of single phase. Mössbauer analysis reveals that extrinsic substitution of metal ions (Mn x and Zr y-Ni y) takes place at 2d, f IV, 2b, and 12k sub-lattices. Doped metal substitution up to ionic contents of x = 0.3 and y = 0.6, results in enhancement of the saturation magnetization M s and remanent magnetization M r while these substitutions lower the coercivity H c. The optimum values of the above mentioned three parameters, measured at room temperature, using a vibrating sample magnetometer (VSM), are 79.7 emu g -1, 36.0 emu g -1 and 1012 Oe, respectively. Microwave absorption characteristics calculated from complex permeability and complex permittivity data retrieved by a vector network analyzer (VNA) increase as the doped metal ions content increases.

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KW - Microwave absorption

KW - Mössbauer spectroscopy

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Mössbauer, magnetic and microwave absorption characteristics of substituted W-type hexaferrites nanoparticles

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