Effect of Ho3+ substitution on magnetic and microwave absorption properties of Sr(ZnZr)0.5Fe12O19 hexagonal ferrite nanoparticles

Sharbati, Ali; Khani, Javad Mola Verdi

doi:10.1007/s10854-013-1295-y

Cited by 7 publications

(3 citation statements)

References 21 publications

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“…The reflection loss of the absorbers was calculated from the standing-wave-ratio (SWR) measured as a function of frequency using vector network analyzer (R&S-ZVK). 16 The vector network analyzer was fully calibrated before use.…”

Section: Methodsmentioning

confidence: 99%

“…14,15 Usually the RE ions were substituted for Sr (Ba) or Fe, taking into accounts the ionic radii of the elements. 16 RE elements can also be used as inhibitor agents of the grain growth mechanism at high temperature. 17 According to this approach, we synthesized dysporium (Dy)-substituted W-type hexagonal ferrites and to study their structural, magnetic, microwave absorption and electrical properties of BaNi 2 Dy x Fe 16−x O 27 powders.…”

Section: Introductionmentioning

confidence: 99%

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Influence of dysprosium addition on the structural, morphological, electrical and magnetic properties of nano-crystalline W-type hexaferrites

et al. 2015

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Dysporium (Dy)-substituted W-type barium hexaferrites were prepared by the citrate sol-gel-method. Crystalline structure, morphology, magnetic properties, DC resistivity and microwave absorption properties of BaNi 2 Dy x Fe 16−x O 27 (x = 0-0.9) were studied using X-ray diffraction, transmission electron microscope (TEM), vibrating sample magnetometer and vector network analyzer and sensitive source meter, respectively. Single-phase W-type barium hexaferrites, with a chemical composition of BaNi 2 Dy x Fe 16−x O 27 (x = 0-0.9), were formed by being heated at 1250 • C for 4 h in air. The magnetic properties such as saturation magnetization (M s ), and coercivity (H c ) were calculated from hysteresis loops. Hysteresis loop measurements show that the coercivity values lie in the range of 530-560 Oe with increasing Dy content. It was also observed that magnetization decreases with the increase of Dy content. The DC resistivity was observed to increase from 0.83 × 10 7 to 6.92 × 10 7 cm with increasing Dy contents due to the unavailability of Fe 3+ ions. Microwave absorption properties of hexaferrite (70 wt%)-acrylic resin (30 wt%) composites were measured by the standing-wave-ratio (SWR) method in the range from 12 to 20 GHz. For sample with x = 0.6, a minimum reflection loss of −40 dB was obtained at 16.2 GHz for a layer of 1.7 mm in thickness. Sample with x = 0.9 had wide bandwidth absorption in the frequency range of 13.5-18 GHz with reflection losses less than −15 dB. Meanwhile the minimum reflection point shifts toward higher frequency with the increase of Dy content.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of dysprosium addition on the structural, morphological, electrical and magnetic properties of nano-crystalline W-type hexaferrites

et al. 2015

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“…With the development of diversification of user demand, appropriate moderate coercivity is a desired property for permanent magnets and high-density perpendicular recording applications. In researchers reported [7][8][9][10], for M-type barium ferrite, large magnetocrystalline anisotropy is the main factor deciding the magnetic properties. M-type barium ferrite has high value of magnetocrystalline anisotropy constant (K 1 = 3.3 9 10 5 J/m 3 ) [11], which determines hard magnetic property of pure BaM ferrite.…”

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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Fabrication and microwave absorption performance of magnetic functionalized xylem fibers/Fe3O4 nanocomposites

Wang

Zhang

et al. 2018

J Mater Sci: Mater Electron

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Effect of Ho3+ substitution on magnetic and microwave absorption properties of Sr(ZnZr)0.5Fe12O19 hexagonal ferrite nanoparticles

Cited by 7 publications

References 21 publications

Influence of dysprosium addition on the structural, morphological, electrical and magnetic properties of nano-crystalline W-type hexaferrites

Influence of dysprosium addition on the structural, morphological, electrical and magnetic properties of nano-crystalline W-type hexaferrites

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

Fabrication and microwave absorption performance of magnetic functionalized xylem fibers/Fe3O4 nanocomposites

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