Effect of Gd3+ substitution on the structural and magnetic properties of barium hexaferrite nanomaterials

Sharma, Saurabh Kumar; Satyapal, Harendra Kumar; Kumar, Singh Sonu; Raj, Arjun; Manash, Aniket; Kumar, Vivek

doi:10.1016/j.matpr.2020.12.650

Cited by 15 publications

(2 citation statements)

References 17 publications

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“…Sharma et al analyzed the effect of Gd 3+ doping in M-type barium hexaferrites. This article describes the effect of induced lattice strain due to Gd 3+ substitution presenting another way to control magnetic properties [21]. Multi substitution in barium hexaferrites has also been utilized extensively to achieve desired magnetic properties e.g.…”

Section: Introductionmentioning

confidence: 99%

Exploring the structural and magnetic trends in Ba_0.9Sm_0.1Fe_12−xAl_xO₁₉ M-type Hexaferrites

Asif¹,

Ranjha²,

Ghori³

et al. 2022

Phys. Scr.

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Current study describes the structural and magnetic properties of Ba0.9Sm0.1Fe12-xAlxO19 (x=0.0, 0.5, 1.0, 2.0, 3.0) M-type hexaferrites. Conventional ceramic route was implied to prepare all the nominal samples. Morphological analysis suggested the non-presence of secondary phases as well as formation of the hexaferrites material. X-ray Diffraction technique was used for structural analysis from which microstructural parameters are calculated and discussed. Magnetic properties are measured at room temperature. The saturation magnetization (Ms) and coercivity (Hc) values shows a cyclic and converse trend for synthesized samples. Firstly, a decrease in Ms and increase in Hc was observed up to intermediate dopant incorporation, and becomes converse for higher doping levels. The maximum coercivity and minimum magnetization is observed for Ba0.9Sm0.1Fe11Al1O19. The c/a and Mr/Ms ratio suggest the formation of perfect M-type hexaferrites. This work suggests that synthesized material is a good option for magnetic applications e.g., transformer and inductor cores, microwave devices, recording heads, and magnetic shielding.

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Section: Introductionmentioning

confidence: 99%

Exploring the structural and magnetic trends in Ba_0.9Sm_0.1Fe_12−xAl_xO₁₉ M-type Hexaferrites

Asif¹,

Ranjha²,

Ghori³

et al. 2022

Phys. Scr.

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show abstract

“…Phase composition was analyzed by X‐ray diffraction (XRD, D/max 2200 PC, Rigaku, Tokyo, Japan) using Cu Ka radiation at the diffraction angles 2θ ranging from 10° to 90° with a scan speed of 4°/min. Some specimens and Si powders used as external standard were analyzed by XRD with a slow scan speed of 1°/min and a scan step of 0.02°, in order to perform Rietveld refinement by FullProf software and calculate the lattice strain by MDI Jade software (Version 6.5, Materials Data, Inc., USA) based on the Williamson–Hall (W‐H) equation: 44,45

\begin{equation}{\beta }_{hkl}\cos \theta = k\lambda /D + 4\sin \theta \end{equation}

where β hkl is the peak full width at half maximum intensity (FWHM) excluding the instrumental FWHM, D , k , λ , and ε are crystallite size, shape factor, the wavelength of CuK α1 radiation, and lattice strain, respectively. The phases were further identified by Raman spectroscopy (Renishaw‐InVia, Renishaw, UK) with the 532 nm argon laser.…”

Section: Methodsmentioning

confidence: 99%

High‐entropy yttrium pyrochlore ceramics with glass‐like thermal conductivity for thermal barrier coating application

et al. 2022

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A 2 B 2 O 7 -type oxides with low thermal conductivities are potential candidates for next-generation thermal barrier coatings. The formation of high-entropy ceramics is considered as a newly effective way to further lower their thermal conductivities. High-entropy Y 2 (Ti 0.2 Zr 0.2 Hf 0.2 Nb 0.2 Ta 0.2 ) 2 O 7 (5HEO) and Y 2 (Ti 0.25 Zr 0.25 Hf 0.25 Ta 0.25 ) 2 O 7 (4HEO) ceramics were prepared by in situ solid reaction sintering, considering the important roles of B-site cations on thermal conductivities of the A 2 B 2 O 7 -type oxides. Reaction process, phase structures, microstructures, and thermal conductivities of the as-sintered ceramics were investigated. Lattice distortion effects on their thermal conductivities were also discussed by using the proposed criterion based on the supercell volume difference of the individual compounds. Near fully-dense 5HEO and 4HEO ceramics were obtained after being sintered at 1600 • C. The former one had a dual-phase structure containing high-entropy Y 2 (Ti 0.227 Zr 0.227 Hf 0.227 Nb 0.136 Ta 0.182 ) 2 O 7.318 pyrochlore oxide (5HEO-P) and Y(Nb, Ta)O 4 solid solution, while the latter one was a single-phase pyrochlore oxide (4HEO-P) with homogeneous element distribution. The formed 5HEO-P oxide has larger lattice distortion than 4HEO-P oxide due to the larger total amounts of Nb and Ta cations at B sites in the 5HEO-P oxide. It results in lower thermal conductivity of 5HEO ceramics (keeping at 1.8 W⋅m -1 ⋅K -1 ) than those of 4HEO ceramics (ranging from 1.8 to 2.5 W⋅m -1 ⋅K -1 ) at temperatures from 25 • C to 1400 • C. Their glass-like thermal conductivities were determined by the selection of B site cations and high-entropy effects. These results provide some useful information for the material design of novel thermal barrier coating materials.

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Dielectric, physicochemical, and reflection loss features of Gd-substituted W-type hexaferrites for microwave absorption application

Yar,

Irfan,

Naheed

et al. 2024

Appl. Phys. A

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Effect of Gd3+ substitution on the structural and magnetic properties of barium hexaferrite nanomaterials

Cited by 15 publications

References 17 publications

Exploring the structural and magnetic trends in Ba_0.9Sm_0.1Fe_12−xAl_xO₁₉ M-type Hexaferrites

Exploring the structural and magnetic trends in Ba_0.9Sm_0.1Fe_12−xAl_xO₁₉ M-type Hexaferrites

High‐entropy yttrium pyrochlore ceramics with glass‐like thermal conductivity for thermal barrier coating application

Dielectric, physicochemical, and reflection loss features of Gd-substituted W-type hexaferrites for microwave absorption application

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Effect of Gd3+ substitution on the structural and magnetic properties of barium hexaferrite nanomaterials

Cited by 15 publications

References 17 publications

Exploring the structural and magnetic trends in Ba0.9Sm0.1Fe12−xAlxO19 M-type Hexaferrites

Exploring the structural and magnetic trends in Ba0.9Sm0.1Fe12−xAlxO19 M-type Hexaferrites

High‐entropy yttrium pyrochlore ceramics with glass‐like thermal conductivity for thermal barrier coating application

Dielectric, physicochemical, and reflection loss features of Gd-substituted W-type hexaferrites for microwave absorption application

Contact Info

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About

Exploring the structural and magnetic trends in Ba_0.9Sm_0.1Fe_12−xAl_xO₁₉ M-type Hexaferrites

Exploring the structural and magnetic trends in Ba_0.9Sm_0.1Fe_12−xAl_xO₁₉ M-type Hexaferrites