Spinel ferrites NiFe2O4 NCs enhanced Mössbauer spectra, magnetization and Faraday rotation of diamagnetic tellurite glasses

Chen, Qiuling; Fan, Jianhua; Miao, Baoji; Xu, Shan

doi:10.1016/j.ceramint.2022.06.292

Cited by 7 publications

(3 citation statements)

References 40 publications

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“…In the context of this study, the introduction of multiple components into the Pb sites within the lattice of CsPbBr 3 unquestionably enhances the disorder and anisotropy of the crystal structure [29]. This is substantiated by the formation of highly distorted orthorhombic and tetrahedral phases.…”

Section: Morphology Composition and Chemical Valence Analysismentioning

confidence: 78%

High-Entropy and Phase-Regulated Engineering of Cs(Pb,Fe,Co,Ni,Mn)Br 3 Perovskite: Enhanced Electromagnetic Wave Absorption with Large Bandwidth

Chen

2023

Preprint

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To address challenges such as signal interference and crosstalk, the development of novel materials with the ability to absorb electromagnetic waves (EMA) is imperative. In this study, we achieved outstanding EMA properties, including an RLmin of 75 dB at 10.2 GHz and a 2.5 mm thickness, accompanied by an exceptionally wide effective bandwidth of 8.8 GHz. We accomplished this feat by employing advanced techniques in high-entropy and phase regulation engineering within the framework of CsMBr3 perovskite. Our approach involved the strategic introduction of diverse magnetic elements, such as Fe, Co, Ni, and Mn, into the CsPbBr3 matrix. The presence of high entropy was validated through meticulous analysis using Rietveld and GIWAXS patterns. We meticulously synthesized high-entropy Cs(Pb, Fe, Co, Ni, Mn)Br3 square nanoparticles within the size range of 30–50 nm, ensuring their uniform dispersion. As we progressively augmented the high-entropy content, we observed notable lattice distortion within PbBr6, ultimately leading to a phase transition characterized by orthorhombic and tetrahedral configurations. Our comprehensive measurements consistently demonstrated improvements in key parameters, including magnetic permeability, dielectric constant, polarization, and attenuation loss, as the high-entropy ratio reached 3 within the crystal. The driving force behind these enhanced EMA characteristics can be attributed to the synergistic effects arising from high-entropy alloying and the introduction of disordered crystal phases. This synergy significantly heightened conductivity, amplified magnetic losses, and fostered multiple scattering effects, collectively contributing to the observed advancements in EMA performance.

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Section: Morphology Composition and Chemical Valence Analysismentioning

confidence: 78%

High-Entropy and Phase-Regulated Engineering of Cs(Pb,Fe,Co,Ni,Mn)Br 3 Perovskite: Enhanced Electromagnetic Wave Absorption with Large Bandwidth

Chen

2023

Preprint

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“…The introduction of multiple components into the Pb sites within the lattice of CsPbBr 3 unquestionably enhances the disorder and anisotropy of the crystal structure 46 . This is substantiated by the formation of highly distorted orthorhombic and tetrahedral phases.…”

Section: Resultsmentioning

confidence: 99%

“…[12][13][14][15][16] The introduction of multiple components into the Pb sites within the lattice of CsPbBr 3 unquestionably enhances the disorder and anisotropy of the crystal structure. 46 This is substantiated by the formation of highly distorted orthorhombic and tetrahedral phases. Such disorder and the imbalance of charge valence within the lattice induce a greater number of defects.…”

Section: 3mentioning

confidence: 96%

Phase transition enhanced electromagnetic wave absorption in Cs(Pb,Fe,Co,Ni,Mn)Br₃‐based high‐entropy compounds

Chen,

2024

J Am Ceram Soc.

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To address challenges such as signal interference and crosstalk, the development of novel materials with the ability of electromagnetic absorption (EMA) is imperative. In this study, the composition of the B‐site of CsPbBr3 was fixed for all samples Pb0.2Fe0.2Co0.2Ni0.2Mn0.2 with varying A/B ratios of 1:1, 1:2, and 1:3. We achieved good EMA properties for the Cs1(Pb0.2Fe0.2Co0.2Ni0.2Mn0.2)3O3, including a minimum reflection loss of 75 dB at 10.2 GHz and a 2.5 mm thickness, accompanied by an exceptionally wide effective bandwidth of 8.8 GHz. X‐ray diffraction, transmittance electron microscopy, and X‐ray photoelectron spectroscopy, etc. were used to characterize the structure, morphology, and EMA‐associated properties of CsMBr3. The presence of high entropy was validated through meticulous analysis using Rietveld and grazing‐incidence wide‐angle scattering patterns. The magnetic permeability, dielectric constant, polarization, and attenuation loss were improved with a high‐entropy ratio of 3 within the 30–50 nm crystals. Notable lattice distortion within PbBr6 and phase transition within high‐entropy alloying are the driving forces behind these enhanced EMA characteristics.

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Structure, EPR, and Mössbauer spectra of La0.8Sr0.2FeO3 nanocrystals modified magnetic glass-ceramics

Chen,

Fan,

2023

J Aust Ceram Soc

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Spinel ferrites NiFe2O4 NCs enhanced Mössbauer spectra, magnetization and Faraday rotation of diamagnetic tellurite glasses

Cited by 7 publications

References 40 publications

High-Entropy and Phase-Regulated Engineering of Cs(Pb,Fe,Co,Ni,Mn)Br 3 Perovskite: Enhanced Electromagnetic Wave Absorption with Large Bandwidth

High-Entropy and Phase-Regulated Engineering of Cs(Pb,Fe,Co,Ni,Mn)Br 3 Perovskite: Enhanced Electromagnetic Wave Absorption with Large Bandwidth

Phase transition enhanced electromagnetic wave absorption in Cs(Pb,Fe,Co,Ni,Mn)Br₃‐based high‐entropy compounds

Structure, EPR, and Mössbauer spectra of La0.8Sr0.2FeO3 nanocrystals modified magnetic glass-ceramics

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Spinel ferrites NiFe2O4 NCs enhanced Mössbauer spectra, magnetization and Faraday rotation of diamagnetic tellurite glasses

Cited by 7 publications

References 40 publications

High-Entropy and Phase-Regulated Engineering of Cs(Pb,Fe,Co,Ni,Mn)Br 3 Perovskite: Enhanced Electromagnetic Wave Absorption with Large Bandwidth

High-Entropy and Phase-Regulated Engineering of Cs(Pb,Fe,Co,Ni,Mn)Br 3 Perovskite: Enhanced Electromagnetic Wave Absorption with Large Bandwidth

Phase transition enhanced electromagnetic wave absorption in Cs(Pb,Fe,Co,Ni,Mn)Br3‐based high‐entropy compounds

Structure, EPR, and Mössbauer spectra of La0.8Sr0.2FeO3 nanocrystals modified magnetic glass-ceramics

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Phase transition enhanced electromagnetic wave absorption in Cs(Pb,Fe,Co,Ni,Mn)Br₃‐based high‐entropy compounds