Investigating samarium doping effects on the structural, morphological, optical and dielectric properties of zinc cobalt ferrites: A detailed insight

IF 3.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences Pub Date : 2025-02-01 DOI:10.1016/j.solidstatesciences.2025.107824

Ayesha Aslam , Muhammad Tayyab Iqbal , Saqib Shabbir , Shahzab Raza , Majed Yousef Awaji , Hafeez Anwar , Zia Ul Haq

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Abstract

In this study, Samarium-substituted zinc cobalt ferrites [Zn_0.5Co_0.5Sm_xFe_2-xO₄, (0.0 ≤ x ≤ 0.2; step 0.02)] were prepared using the simple co-precipitation technique. XRD analysis with Rietveld refinement confirmed a single-phase spinel cubic structure, with lattice constants ranging from 8.39 to 8.43 Å and 8.385 to 8.420 Å, respectively. Crystallite sizes, determined via Scherrer's and Williamson-Hall methods, ranged between 29.16 - 34.09 nm and 35.2–52.6 nm, respectively. SEM results revealed spherical nanoparticles ranging from 0.28 to 0.38 μm, determined using ImageJ software. FTIR spectra showed metal oxide absorption peaks at 430 cm⁻¹ and 529 cm⁻¹, confirming the presence of a cubic spinel phase. UV–visible analysis indicated a decreasing energy band gap from 2.91 to 2.76 eV with increasing rare earth (RE) Sm³⁺ substitution. The dielectric constant has a maximum value at higher frequencies ranging from 0.5 to 3.2 GHz, while AC conductivity reached a maximum of 0.025 (Ω cm)⁻¹. The electric modulus increased steadily with frequency. Such improved properties make these materials potential candidates for high frequency devices, actuators and energy storage systems applications.

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来源期刊

Solid State Sciences 化学-无机化学与核化学

CiteScore

6.60

自引率

2.90%

发文量

214

审稿时长

27 days

期刊介绍： Solid State Sciences is the journal for researchers from the broad solid state chemistry and physics community. It publishes key articles on all aspects of solid state synthesis, structure-property relationships, theory and functionalities, in relation with experiments. Key topics for stand-alone papers and special issues: -Novel ways of synthesis, inorganic functional materials, including porous and glassy materials, hybrid organic-inorganic compounds and nanomaterials -Physical properties, emphasizing but not limited to the electrical, magnetical and optical features -Materials related to information technology and energy and environmental sciences. The journal publishes feature articles from experts in the field upon invitation. Solid State Sciences - your gateway to energy-related materials.