Sol–gel synthesis, structural and magnetic properties of nanoscale M-type barium hexaferrites BaCoxZrxFe(12−2x)O19

Chawla, S.K.; Mudsainiyan, Rahul Kumar; Meena, Sher Singh; Yusuf, S.M.

doi:10.1016/j.jmmm.2013.09.007

Cited by 167 publications

(30 citation statements)

References 42 publications

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“…4 shows the FTIR spectra of barium hexaferrite with the various amounts of dopants. For all samples, there are two absorption band in the area between 400 cm À 1 and 800 cm À 1 , which are related to the Fe-O stretching vibration band in octahedral and tetrahedral sites [18][19][20]. The gradual shift of both bands toward low frequency side with the increase of dopants content can be related to the substitution of large amounts of Zn þ 2 , Co þ 2 and Zr þ 4 cations affecting the distribution of Fe þ 3 ions.…”

Section: Structural Characteristicsmentioning

confidence: 91%

“…This peak cannot be observed in the doped samples with (x 40.2) as it overlaps with the shifted characteristic peaks of hexaferrite [18]. The peaks in the range of 1100-1500 cm À 1 related to M-O-M bands (Metal-Oxygen-Metal) such as Co-O-Co and Fe-O-Fe bands [19][20]. The absorption band for H-O-H bending vibration in water is around 1620 cm À 1 .…”

Section: Structural Characteristicsmentioning

confidence: 91%

“…The sites of 12k, 2a and 2b have upward spin direction, while the 4f 1 and 4f 2 sites have downward spin directions. The magnetic moment per formula of BaM hexaferrite is determined as the algebraic sum of magnetic moments of irons in different positions as follows [4,20]:…”

Section: Magnetic Propertiesmentioning

confidence: 99%

See 2 more Smart Citations

Structural, magnetic and microwave absorption properties of doped Ba-hexaferrite nanoparticles synthesized by co-precipitation method

Alam

Moradi

Rostami

et al. 2015

Journal of Magnetism and Magnetic Materials

181

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Section: Structural Characteristicsmentioning

confidence: 91%

Section: Structural Characteristicsmentioning

confidence: 91%

See 1 more Smart Citation

Structural, magnetic and microwave absorption properties of doped Ba-hexaferrite nanoparticles synthesized by co-precipitation method

Alam

Moradi

Rostami

et al. 2015

Journal of Magnetism and Magnetic Materials

181

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“…This result suggested that low levels of Cr 3+ doping (x ≤ 0.2) improved the saturation magnetization of barium ferrite. The magnetic moment, as shown in the formula for BaM hexaferrite, was determined as the algebraic sum of magnetic moments of irons in different positions as follows (Chawla et al 2014…”

Section: Magnetic Propertiesmentioning

confidence: 99%

Magnetic Biomorphic BaFe12-xCrxO19 Ceramics with Multilayer Wall Structure Made from Spruce Templates

Li¹,

Shu²,

Lei³

et al. 2016

BioResources

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*BaFe12-xCrxO19 (x = 0.0, 0.1, 0.2, 0.3, and 0.4) ferrite ceramics were prepared by a sol-gel method using spruce sapwoods as the templates. The prepared materials were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and a magnetic property measurement system (MPMS). The prepared materials maintained a multilayer wall structure of spruce sapwoods. All samples presented the single-phase of the magnetoplumbite barium hexaferrite. The saturation magnetization initially increased until it reached a maximum value at x = 0.2 and then decreased in three directions (parallel cross section, parallel radial section, and parallel tangential section). The coercivity decreased monotonously when measured in three directions. However, the coercivity was obviously lower in the parallel cross section direction than in the other directions because of the structural anisotropy caused by the multilayered wall structure.

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“…There are several techniques to improve magnetic properties of barium ferrite, such as changing synthesis method [1], different sintering routes [15], controlling the decomposition [16] and ion substitution [17][18][19]. Among these techniques, ion substitution was considered the most efficient method to improve magnetic properties, especially Co-Ti ions co-substitution [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

The transformation behavior of M-type barium ferrites due to Co–Ti substitution

Zhang

Liu

et al. 2015

J Mater Sci: Mater Electron

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In this paper, we synthesized Co-Ti equiatomic co-substitution of M-type barium ferrites [BaFe 12-2x (CoTi) x O 19 , x = 1.00-1.30 with step of 0.05] by solid state reaction method. All samples exhibited a single-phase M-type barium ferrite structure, compared with pure M-type barium ferrite (x = 0.00). With increasing of Co-Ti content, saturation magnetization (M s ) decreased, gradually. However, coercivity (H c ) appeared decreased first and then increased after x = 1.20. The minimum value of coercivity was 258.08 Oe at x = 1.20. Meanwhile, magnetic permeability (l) also first increased to a high value and then decreased rapidly after x = 1.20. The maximum value of l reached about 25 (at x = 1.10). The appropriate contents of Co-Ti substitution makes the magnetocrystalline anisotropy transform from uniaxial to planar anisotropy. Due to Co-Ti substitution, the magnetocrystalline anisotropy constant decreases from a high value and reach a minimum value, and changes from positive to negative value, increases oppositely, this determines the changes of magnetic properties.

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Sol–gel synthesis, structural and magnetic properties of nanoscale M-type barium hexaferrites BaCoxZrxFe(12−2x)O19

Cited by 167 publications

References 42 publications

Structural, magnetic and microwave absorption properties of doped Ba-hexaferrite nanoparticles synthesized by co-precipitation method

Structural, magnetic and microwave absorption properties of doped Ba-hexaferrite nanoparticles synthesized by co-precipitation method

Magnetic Biomorphic BaFe12-xCrxO19 Ceramics with Multilayer Wall Structure Made from Spruce Templates

The transformation behavior of M-type barium ferrites due to Co–Ti substitution

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