Microstructural, magnetic, dielectric, and optical studies of La‐doped Sr₂Fe_0.5Hf_1.5O₆ double perovskite oxides

Journal of the American Ceramic Society, Год журнала: 2025, Номер unknown

Опубликована: Фев. 4, 2025

Abstract Herein, we report on the structural, magnetic, dielectric, and optical properties of La‐doped Sr 2‐ x La Fe 0.5 Hf 1.5 O 6 (SLFHO, 0.0 ≤ 2.0) double perovskite oxides synthesized by solid‐state reaction method. X‐ray powder diffraction data their Rietveld refinement reveal that SLFHO powders crystallize in an orthorhombic structure with Pnma space group. The exhibit spherical morphology average particle size 160 nm, as shown from SEM images. Their molar ratios Sr:La:Fe:Hf elements were determined 1.77:0.50:0.50:1.95 energy dispersive spectroscopy data, approaching nominal stoichiometry. photoelectron spectra verified 2+ , 3+ 4+ (Hf x+ ) ions existed powders, oxygen species lattice adsorbed oxygen, respectively. ferromagnetic behavior at 2 300 K, respectively, K saturated magnetization was 5.66 emu/g (or 0.60 μ B /f.u.). Magnetic transition temperature, T C to be 867 K. Dielectric measurements demonstrated a strong frequency‐dependent dielectric observed ceramics relaxor‐like appearing temperature range 200–600 Such is ascribed response singly‐ionized vacancies ( activation 0.54 eV. Room examined using UV–vis diffuse reflectance high absorption this wavelength region, wide indirect bandgap E g = 3.39 eV) estimated Tauc's relation spectra. display high‐temperature ferrimagnetism, behavior, bandgap, making them potential employed fields spintronics magnetic semiconductor devices.

Язык: Английский

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A detail investigation on the structural, elastic, magnetic and dielectric properties of rare earth Dy3+ substituted Fe rich cobalt ferrite nanoparticles

Materials Chemistry and Physics, Год журнала: 2025, Номер unknown, С. 130561 - 130561

Опубликована: Фев. 1, 2025

Язык: Английский

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Room-Temperature Multiferroic Enhancement in Cobalt and Iron Co-Doped Aurivillius Ceramics via Defect Engineering Strategy

Materials Chemistry and Physics, Год журнала: 2025, Номер unknown, С. 130620 - 130620

Опубликована: Фев. 1, 2025

Язык: Английский

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Development of high-performance soft magnetic composites: influence of binder, CIP content, and nanocrystalline alloy powder size

Journal of Materials Science Materials in Electronics, Год журнала: 2025, Номер 36(9)

Опубликована: Март 1, 2025

Язык: Английский

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Effect of Surface Modification by Selective Oxidation on the Microstructure and Core Loss in Fe–3Si–5.5Cr Soft Magnetic Composite

ACS Applied Electronic Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 4, 2025

Язык: Английский

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Impact of lanthanum doping on crystal structure and magnetic anisotropy of Mn-Zn soft nanoferrites

Scientific Reports, Год журнала: 2025, Номер 15(1)

Опубликована: Апрель 5, 2025

The synthesis of lanthanum (La) substituted Zn (Mn0.6Zn0.2La0.2Fe2O4) and Fe (Mn0.6Zn0.4La0.2Fe1.8O4) was performed using sol-gel auto-combustion techniques to investigate the effects doping on structural magnetic properties Mn-Zn nanoferrites. X-ray diffraction transmission electron microscopy confirmed development a single-phase spinel structure reduction in crystallite size (from 16 10.7 nm) with La substitution. Although saturation magnetization (Ms) decreased due changes cation distribution interactions, led an increase initial permeability. This enhancement linked Ms magneto-crystalline anisotropy constant (K1). permeability loss factor (tan δµ) remained low (around 10- 2) for La-doped ferrites, indicating minimal energy at room temperature. These results suggest promising potential advanced biomedical applications, line Sustainable Development Goals (SDGs). technique provides scalable environmentally friendly method synthesizing these materials, supporting SDG targets related responsible consumption production (SDG 12).

Язык: Английский

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FeSi@BN soft magnetic composites inspired by fried glutinous rice balls: A core–shell design for enhanced magnetic and thermal performance in high-frequency power applications

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 163501 - 163501

Опубликована: Май 1, 2025

Язык: Английский

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Study of Lanthanide Based Ln2MgSe4 (Ln= Er, Pm) Spinels for Spintronic and Optoelectronic Applications

Physica Scripta, Год журнала: 2024, Номер 99(12), С. 125911 - 125911

Опубликована: Окт. 18, 2024

Abstract Herein, the full potential linearized augmented plane wave (FP-LAPW) method within framework of density functional theory (DFT) is used to examine physical features Ln 2 MgSe 4 (Ln = Er, Pm) spinel selenides. Exchange correlation energies are estimated through modified Becke–Johnson (mBJ). Band structures (BS) and states (DOS) data proved that Er ferromagnetic (FM) semiconductor while Pm half metallic (HFM) in nature. The Er- f contributed majorly vicinity Fermi level for both compounds. structural stability determined calculating tolerance factor geometry optimization, thermodynamical has been realized by computing formation enthalpy. Furthermore, various optical parameters have computed which describe considered materials’ response incident light. Our study explored properties two based spinels found being optoelectronic spintronic devices.

Язык: Английский

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Impact of Co2+ Substituted La2CuO4 Nanoparticles: Structural, Morphological, Optical and Magnetic Behaviour

Journal of Inorganic and Organometallic Polymers and Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 9, 2025

Язык: Английский

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Investigating the Effect of Carbonyl Iron Powder Doping on the Microstructure and Magnetic Properties of Soft Magnetic Composites

Magnetochemistry, Год журнала: 2024, Номер 10(4), С. 23 - 23

Опубликована: Март 30, 2024

This study proposes the thermal decomposition of salt compounds and doping carbonyl iron powders (CIPs) to optimize preparation an insulating layer through solid-phase interface reaction. First, (Fe–Si–Cr + CIPs)/ZnSO4 composite were synthesized using hydrothermal method CIPs)/ZnO·SiO2·Cr2O3 SMCs with a ZnO·SiO2·Cr2O3 insulation prepared heat treatment cold pressing. The effect CIP content on microstructure magnetic properties then investigated. During treatment, ZnSO4 decomposed into solid ZnO gaseous SO2 O2. O2 drives reaction, prompting migration nonmagnetic Si Cr atoms from interior Fe–Si–Cr soft powder surface layer, finally forming layer. doped CIPs also show good plasticity during coating process, combining fill internal pores SMCs. Moreover, as particles are small high area, they increase number reaction sites for facilitate growth promoting its uniform distribution surfaces CIPs. lattice mismatch between is reduced while magnetic-phase increased, allowing effective sin can be precisely regulated by changing amount Unlike other layer–preparation strategies based interfacial proposed exploits specific area removes powder.

Язык: Английский

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