Impact of rare-earth ions on the physical properties of hexaferrites Ba0.5Sr0.5RE0.6Fe11.4O19, (RE = La, Yb, Sm, Gd, Er, Eu, and Dy)

Hashhash, A.; Hassen, A.; Baleidy, W.S.; Refai, H. S.

doi:10.1016/j.jallcom.2021.159812

Cited by 37 publications

(12 citation statements)

References 39 publications

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“…The magnetic field anisotropy (Ha) and d decreased with presintering temperature, while porosity negatively affects Ha. However, in this work, there is a decreasing trend in Ha initially, than increased at 1300 °C due to the increasing BaM content and plate-like shape of the BaM particles with high aspect ratio at higher sintering temperatures [53,54].…”

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confidence: 52%

Structural and magnetic properties of BaFe_9.95Al₂Mg_0.05O₁₉tuned through sintering temperature

Asif,

Ranjha,

Ghori

et al. 2023

Phys. Scr.

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The sintering temperature is a key way to tune the structural and magnetic properties of M-type hexaferrites. Here the effect of sintering temperature on BaFe9.95Al2Mg0.05O19 M-type hexagonal Ba-hexaferrites was studied. X-ray diffraction analysis revealed the presence of Fe2O3 impurity phases in all samples. The results showed that as the sintering temperature increased, the saturation magnetization and remanence ratio initially increased, then decreased at higher temperatures. On the other hand, the coercivity and magnetocrystalline anisotropy field decreased first, then increased. The morphology suggested that average grain size consistently grew between 800-2800 nm with increasing temperature. The optimal magnetic properties of BaFe9.95Al2Mg0.05O19 were achieved at a sintering temperature of 1280 ℃, with saturation magnetization 49.94 emu/g, coercivity 4.99 kOe, anisotropic field 1.5kOe, and magnetic moment of 9.4097µB. The findings suggest that the magnetic properties of M-type hexagonal ferrites can be significantly enhanced by optimizing the sintering temperature, which has implications for the development of high-performance self-biased circulators, Magnetic filters, and other magnetic applications.

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confidence: 52%

Structural and magnetic properties of BaFe_9.95Al₂Mg_0.05O₁₉tuned through sintering temperature

Asif,

Ranjha,

Ghori

et al. 2023

Phys. Scr.

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Section: Properties Of Hexagonal Ferritesmentioning

confidence: 99%

“…[ 215 ] Efforts have been made to enhance the magnetic characteristics of hexaferrite by cationic substitution to meet a variety of applications. [ 148,216 ] These includes efforts on altering the intrinsic properties of hexaferrites by replacing with either single or multiple trivalent metal ions such as La 3+ , [ 217–221 ] Tb 3+ , [ 222,223 ] Nd 3+ , [ 138–140,224–226 ] Eu 3+ , [ 227 ] Dy 3+ , [ 228,229 ] Sm 3+ , [ 230,231 ] Cr 3+ , [ 232,233 ] Al 3+ , [ 185,186,234,235 ] Gd 3+ , [ 236–238 ] Sc 3+ , [ 239 ] Er 3+ , [ 240–242 ] Pr 3+ , [ 243 ] Yb 3+ , [ 244 ] Ce 3+ , [ 245 ] La 3+ –Pr 3+ , [ 246 ] La 3+ –Nd 3+ , [ 247 ] Nd 3+ –Sm 3+ , [ 248 ] Nb 3+ –Y 3+ , [ 249 ] La 3+ –Ce 3+ , [ 250 ] Er 3+ –Cr 3+ , [ 251 ] Dy 3+ –Nd 3+ –Pr 3+[ 252 ] or a suitable mix of divalent and trivalent ions such as Tb 3+ –Mn 2+ , [ 253 ] Nd 3+ –Co 2+ , [ 254 ] Gd 3+ –Co 2+ , [ 255 ] Pr 3+ –Mn 2+ , [ 256 ] Sm 3+ –Co 2+ , [ 257 ] La 3+ –Co 2+ , [ 258 ] La 3+ –Mn 2+ , [ 259 ] Pr 3+ –Co 2+ , [ 260 ] Cu 2+ –Cr 3+ , [ 261 ] Al 3+ –Mg 2+ , [ 262 ] Ce 3+ –Zn 2+ , [ 263 ] Ce 3+ –Co 2+ , [ 264 ] Gd 3+ –Mn 2+ ‐Co 2+ , [ 265 ] Ca 2+ –La 3+ –Co 2+[ 266 ] or tetravalent Zr 4+[ 267 ] or a divalent and tetravalent ions such as Co 2+ –Si 4+ , [ 268 ] Cu 2+ –Zr 4+,[ 269 ] Zr 4+ –Co 2+ , [...…”

Section: Properties Of Hexagonal Ferritesmentioning

confidence: 99%

Recent Progress in Hexagonal Ferrites Based Composites for Microwave Absorption

Mohammed

Mohammed²,

Srivastava

2022

Cryst. Res. Technol.

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With the fast growth of wireless communication technology in high‐frequency ranges, electromagnetic (EM) interference has become a growing concern that has drawn international attention. The development of materials that can absorb EM radiation is a crucial solution. This review provides a detailed overview of ferrites, specifically hexagonal ferrites and their composites for microwave (MW) absorption. It examines hexagonal ferrite classifications based on the stacking order of their fundamental blocks and their synthesis methods and strategies for improving their magnetic properties. On the other hand, this review included a detailed examination of hexagonal ferrites–conducting polymer, hexagonal ferrites–2D materials, and hexagonal ferrite–other nanomaterials composites for MW absorption applications. Enhancing MW absorption in hexagonal ferrites‐based microwave absorption materials (MAMs) regulates their EM characteristics, improves impedance matching, and creates a diversity of loss mechanisms. In addition, the limitations, challenges, and opportunities of hexagonal ferrites‐based MAMs are discussed, which will be helpful to those working in related areas. As a general application potential, it is worth mentioning that, as a result of recent promising findings in the synthesis of hexagonal ferrites‐based composites, hexaferrite‐based composites are suitable devices in the area of microwave absorption.

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“…In order to make hexaferrites suitable for a range of technological applications, dopants must be induced into the materials to enhance their structural and magnetic properties. M-type hexaferrites have been the subject of much prior research that has been documented in the literature [23,24]. Several studies have examined the effects of different dopants on the structural and magnetic properties of hexaferrites [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Microstructural, morphological and magnetic behaviour of Al³⁺ replaced BaFe_11.5Co_0.5O₁₉ hexaferrites synthesized via sol-gel auto combustion route

Ijaz,

Asif,

Solre

et al. 2024

Phys. Scr.

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In this work, polycrystalline BaFe11.5-xAlxCo0.5O19 (0≤x≤2) hexaferrite samples were synthesised by means of the sol-gel technique. Thereafter, the magnetic and structural properties are thoroughly examined. Cell refinement and XRD examination verified a magnetoplumbite hexaferrite arrangement with a space group of P63/mmc for each sample. The parameters 'a' and 'c' in the lattice fall in value from 5.885 Å to 5.875 Å and from 23.117 Å to 23.049 Å, respectively. Both the average crystallite size and the unit cell volume exhibit a declining trend as the doping level increases. For M-type hexaferrites, the optimal range of c/a values is determined to be 3.923-3.928. The refining process quality was confirmed by the fit good-ness (χ2) values, which fall within the range of 1.079-1.094. X-ray density (dx) and bulk density (db) decline with rising doping contents until x=1.5 doping content, at which point they exhibit an increasing trend. The results showed that as the doping amount increased, the saturation and remanence magnetizations decreased. Coercivity and magnetocrystalline anisotropy are rising together. Both the anisotropy field (Ha) and the anisotropy parameter (B) exhibit a rising trend with doping content. Coercivity of 5.896 kOe, anisotropic applied field of 1.84 kOe, saturation magnetization of 42.68 emu/g, remanence magnetization of 24.414 (emu/g), and magnetic moment per formula unit-(mB) of 11.19µB are the best magnetic properties obtained for the BaFe10Al1.5Co0.5O19 sample.

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Impact of rare-earth ions on the physical properties of hexaferrites Ba0.5Sr0.5RE0.6Fe11.4O19, (RE = La, Yb, Sm, Gd, Er, Eu, and Dy)

Cited by 37 publications

References 39 publications

Structural and magnetic properties of BaFe_9.95Al₂Mg_0.05O₁₉tuned through sintering temperature

Structural and magnetic properties of BaFe_9.95Al₂Mg_0.05O₁₉tuned through sintering temperature

Recent Progress in Hexagonal Ferrites Based Composites for Microwave Absorption

Microstructural, morphological and magnetic behaviour of Al³⁺ replaced BaFe_11.5Co_0.5O₁₉ hexaferrites synthesized via sol-gel auto combustion route

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Impact of rare-earth ions on the physical properties of hexaferrites Ba0.5Sr0.5RE0.6Fe11.4O19, (RE = La, Yb, Sm, Gd, Er, Eu, and Dy)

Cited by 37 publications

References 39 publications

Structural and magnetic properties of BaFe9.95Al2Mg0.05O19tuned through sintering temperature

Structural and magnetic properties of BaFe9.95Al2Mg0.05O19tuned through sintering temperature

Recent Progress in Hexagonal Ferrites Based Composites for Microwave Absorption

Microstructural, morphological and magnetic behaviour of Al3+ replaced BaFe11.5Co0.5O19 hexaferrites synthesized via sol-gel auto combustion route

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Structural and magnetic properties of BaFe_9.95Al₂Mg_0.05O₁₉tuned through sintering temperature

Structural and magnetic properties of BaFe_9.95Al₂Mg_0.05O₁₉tuned through sintering temperature

Microstructural, morphological and magnetic behaviour of Al³⁺ replaced BaFe_11.5Co_0.5O₁₉ hexaferrites synthesized via sol-gel auto combustion route