An investigation of the titanium effect on the structural and magnetic properties of BaNi2 based W-type hexaferrites

Iqbal, Muhammad Azhar; Tahir, W.; Murtaza, Ghulam; Noor, N.A.; Ali, Salamat; Kubra, Khadija Tul

doi:10.1016/j.ceramint.2012.01.021

Cited by 13 publications

(3 citation statements)

References 26 publications

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“…Various techniques such as chemical co-precipitation [9,10], sol-gel [11,12], standard ceramic [13,14], microemulsion, and reverse micelle [15] were employed for the synthesis of hexaferrites. Among these different techniques, chemical co-precipitation method is found to be very suitable because of its simplicity, lower cost, and comparatively lower annealing temperature and annealing time to achieve the pure single phase.…”

Section: Introductionmentioning

confidence: 99%

Effects of Divalent Ion Substitution on the Microstructure and Magnetic Properties of SrCo 2−x (MnZnCa) x/3Fe 1 6 O 2 7 Nanoparticles

Ghasemi

2016

J Supercond Nov Magn

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W-type hexaferrite nanoparticles with a composition of SrCo 2−x (MnZnCa) x/3 Fe 16 O 27 (x = 0-0.5) were synthesized by a chemical co-precipitation method. The effect of substitution of Mn, Zn, and Ca cations on the structural and magnetic properties of nanoparticles was characterized by X-ray diffraction (XRD), Fourier transformed infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDX), and vibrating sample magnetometer (VSM). The XRD patterns confirmed the existence of hexagonal W-type single phase ferrite. According to the SEM micrographs, it was found that the particle size lies in the range of 40-60 nm, with an irregular configuration. The elemental composition estimated from the EDX analysis was in good agreement with the nominal composition. Hysteresis loops for all samples were measured at a room temperature up to a maximum applied field of 10 kOe. The results revealed that with an increase in substitutional cation contents, the values of saturation magnetization and coercivity decreased from 78.4 to 70.8 emu/g and the values of coercivity also decreases from 1350 to 940 Oe. Correlation between structural and magnetic analyses was also earned out.

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Section: Introductionmentioning

confidence: 99%

Effects of Divalent Ion Substitution on the Microstructure and Magnetic Properties of SrCo 2−x (MnZnCa) x/3Fe 1 6 O 2 7 Nanoparticles

Ghasemi

2016

J Supercond Nov Magn

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“…Therefore, the unit cell is composed of the sequence RSSR * S * S * . Fe 3+ ions contribute positively to magnetization [3]. On the other hand, the Fe 2+ ions are positioned at seven crystallography dierent sites, namely 2d, 4f 1 (4f…”

Section: +mentioning

confidence: 99%

“…Barium hexagonal ferrites (BHF) are ideal lters for electromagnetic interference attenuation purposes due to their low cost, high stability and high density [3]. The crystal structure of barium hexagonal ferrites (BHF) are divided into six dierent types: M In the present work, the structure and the magnetic properties of the W-type barium hexaferrite BaMg 2−x Co x Fe 16 O 27 (x = 0.0, 1, 2) were studied using rst principle method.…”

Section: Introductionmentioning

confidence: 99%

Structural Design and Characterization of BaMg_xCo_2-xFe₁₆O₂₇Hexaferrites Based on ab initio Computations

2014

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Structural design of barium hexaferrites BaMgxCo2−xFe16O27 (x = 0.0, 1, 2) has been studied, and the magnetic and electronic structure of that has then been investigated using rst principle total energy calculation. All calculations are based on the density functional theory. In order to improve the description of strongly correlated 3d electrons of iron, the general gradient approximation plus Hubbard U (GGA+U ) method is used. We found that in the lowest energy conguration Mg and Co ions preferentially occupy the 6g sites. With the increase of Mg content x, the energy gap of BaMgxCo2−xFe16O27 increases but the lattice constant of unit cell decreases. The magnetic moment of the unit cell for Mg content x = 0, 1, and 2 are calculated to be 52, 49 and 46 µB/cell, respectively, in agreement with previous experimental results. The substitutions of Mg and Co at the BaFe 2+ 2 Fe 3+ 16 O27 decrease electrical conductivity and transit it from a half-metal to semiconductor material. Based on our calculations on electronic band structure, the BaFe2Fe16O27 (BFFO) is a weak half-metal, but BaMg2Fe16O27 (BMFO), BaMgCoFe16O27 (BMCFO) and BaCo2Fe16O27 (BCFO) are semiconductors. The electrical resistivity increases by increasing Mg and Co contents due to increase in porosity which prevents the hopping of charge carriers.

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On the Magnetic Analysis of External Magnetic Field Annealing of Co 2 -W Hexagonal Shape Particles

Ghasemi

2016

J Supercond Nov Magn

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An investigation of the titanium effect on the structural and magnetic properties of BaNi2 based W-type hexaferrites

Cited by 13 publications

References 26 publications

Effects of Divalent Ion Substitution on the Microstructure and Magnetic Properties of SrCo 2−x (MnZnCa) x/3Fe 1 6 O 2 7 Nanoparticles

Effects of Divalent Ion Substitution on the Microstructure and Magnetic Properties of SrCo 2−x (MnZnCa) x/3Fe 1 6 O 2 7 Nanoparticles

Structural Design and Characterization of BaMg_xCo_2-xFe₁₆O₂₇Hexaferrites Based on ab initio Computations

On the Magnetic Analysis of External Magnetic Field Annealing of Co 2 -W Hexagonal Shape Particles

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An investigation of the titanium effect on the structural and magnetic properties of BaNi2 based W-type hexaferrites

Cited by 13 publications

References 26 publications

Effects of Divalent Ion Substitution on the Microstructure and Magnetic Properties of SrCo 2−x (MnZnCa) x/3Fe 1 6 O 2 7 Nanoparticles

Effects of Divalent Ion Substitution on the Microstructure and Magnetic Properties of SrCo 2−x (MnZnCa) x/3Fe 1 6 O 2 7 Nanoparticles

Structural Design and Characterization of BaMgxCo2-xFe16O27Hexaferrites Based on ab initio Computations

On the Magnetic Analysis of External Magnetic Field Annealing of Co 2 -W Hexagonal Shape Particles

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Structural Design and Characterization of BaMg_xCo_2-xFe₁₆O₂₇Hexaferrites Based on ab initio Computations