Journal of Solid State Chemistry最新文献

{"title":"Novel CoCdFe2O4/Chitosan–PANi ternary nanocomposite for High-Efficiency Lead Removal","authors":"Thamer Adnan Abdullah ,&nbsp;Alyaa H. Abdalsalam ,&nbsp;Ali A. Ati ,&nbsp;Rashed T. Rasheed ,&nbsp;Sarmad Al–Anssari ,&nbsp;Oday I. Abdullah ,&nbsp;Mukhtar Ali Hussein ,&nbsp;Mais A. Mohammed ,&nbsp;Karol Kułacz ,&nbsp;Phuoc-Cuong Le","doi":"10.1016/j.jssc.2025.125794","DOIUrl":"10.1016/j.jssc.2025.125794","url":null,"abstract":"<div><div>Heavy metal pollution, particularly lead (Pb²⁺), poses a significant threat to the environment and human health. In this study, it was synthesized and analyzed a unique nanocomposite by preparing cadmium-cobalt in specific ratios with ferrite nanoparticles on a polymer. This resulted in the nanocomposite (Co_0·2Cd_0·8Fe₂O₄/PANi–g–Chitosan), which was used to remove lead ions efficiently. The nanocomposite consists of cobalt and cadmium ferrite nanoparticles with a chitosan and polyaniline polymer matrix, which was synthesized chemically. This novel nanocomposite exhibits exceptional removal efficiency, demonstrating remarkable performance. The properties of the nanocomposite were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and UV–Vis spectroscopy. These tests confirmed the successful fabrication and structural integrity of the nanocomposite. The nanocomposite exhibited high adsorption and purification efficiency, achieving 97.8 % removal of lead ions at pH 5. The adsorption behavior was investigated by studying the reaction kinetics (using a pseudo-second-order reaction model) and analyzing the adsorption curve, providing valuable insights into the reaction mechanisms. Notably, the Taguchi method was employed to optimize the adsorption parameters. This analysis revealed that adsorption time and pH value are significant factors. The optimal conditions were: contact time of 90 min, a pH of 5, and a shaking speed of 200 rpm, based on Taguchi results. The removal of lead ions using this nanocomposite revealed great potential as an effective nanocomposite for purifying water.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125794"},"PeriodicalIF":3.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145880318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microfluidic synthesis of high-brightness Cu2+ doped CsPbBr3 PQD and its flexible film for X-ray scintillator","authors":"Chang-Qing Lin ,&nbsp;Jun-Peng Deng ,&nbsp;Zhe-Hui Lu ,&nbsp;Zhen-Hua Liang ,&nbsp;Yu-Ru Ling ,&nbsp;Jun-Xi Liu ,&nbsp;Wang Han ,&nbsp;Chun-Yang Pan","doi":"10.1016/j.jssc.2025.125802","DOIUrl":"10.1016/j.jssc.2025.125802","url":null,"abstract":"<div><div>Cu²⁺ doped CsPbBr₃ PQDs with a PLQY of 91 % were synthesized via a continuous microfluidic approach. The precise regulation of flow rate and reaction temperature enabled fine control over the crystal size and structure. Time-resolved photoluminescence (TRPL) and transient absorption (TA) spectroscopy revealed picosecond-scale carrier recombination dynamics and distinct band-edge bleaching behavior in CsPb_0.89Cu_0.11Br₃ PQDs, confirming the effective defect passivation induced by Cu²⁺ incorporation. Furthermore, flexible CsPb_0.89Cu_0.11Br₃/PCL composite films exhibited an exceptional light yield of 21340 photons MeV⁻¹ and a low detection limit of 82.5 nGy s⁻¹ under X-ray excitation.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125802"},"PeriodicalIF":3.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145880322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Strong oxidizing annealing of bilayer La3Ni2O7-δ results in suppression of superconductivity under high pressure","authors":"Yulin Zhang ,&nbsp;Cuiying Pei ,&nbsp;Ning Guo ,&nbsp;Feiyu Li ,&nbsp;Longlong Fan ,&nbsp;Mingxin Zhang ,&nbsp;Lingzhen Wang ,&nbsp;Gongting Zhang ,&nbsp;Yunong Wang ,&nbsp;Chao Ma ,&nbsp;Wenyong Cheng ,&nbsp;Shanpeng Wang ,&nbsp;Qiang Zheng ,&nbsp;Yanpeng Qi ,&nbsp;Junjie Zhang","doi":"10.1016/j.jssc.2025.125757","DOIUrl":"10.1016/j.jssc.2025.125757","url":null,"abstract":"<div><div>The discovery of superconductivity with an onset temperature of ∼80 K in pressurized bilayer Ruddlesden-Popper La₃Ni₂O_7-δ has attracted much attention. Despite intense research, determination of the exact oxygen content and understanding of the relationship between superconductivity and oxygen content remain a big challenge. Here, we report a systematical study on the structure and physical properties of La₃Ni₂O_7-δ polycrystalline powders which were prepared using the sol-gel method at ambient pressure and then annealed under high oxygen pressure (pO₂) or in ozone. The superconducting transition of La₃Ni₂O_7-δ at ∼80 K under high pressure is suppressed for high pO₂ and ozone annealed samples. We attribute this to the combination of the following two reasons: (i) damage of the bilayer structure, as revealed by powder X-ray diffraction, scanning transmission electron microscopy and pair distribution function measurements, and (ii) hole overdoping due to the increasing of oxygen content. Our results reveal that the bilayer structure in La₃Ni₂O_7-δ is fragile and post-annealing under mild oxidization is suitable for maintaining the integrity of the bilayer structure and increasing oxygen content.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125757"},"PeriodicalIF":3.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145734433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis, structure and magnetic properties of two selenites, Li2Mn2.5(SeO3)4 and Li2Co3(SeO3)4 with a one-dimensional spin-chain","authors":"Mingming Huang ,&nbsp;Shoushuang Li ,&nbsp;Rui Cui ,&nbsp;Laura C.J. Pereira ,&nbsp;Ambre Theron ,&nbsp;Olivier Mentré ,&nbsp;Xiedong Cheng ,&nbsp;Feifan Li ,&nbsp;Hui Shao ,&nbsp;Minfeng Lü","doi":"10.1016/j.jssc.2025.125795","DOIUrl":"10.1016/j.jssc.2025.125795","url":null,"abstract":"<div><div>Two transition metal selenites Li₂Mn_2.5(SeO₃)₄ and Li₂Co₃(SeO₃)₄ were synthesized using hydrothermal and solid-state reactions, respectively. Both compounds form similar three-dimensional (3D) frameworks featuring twisted one-dimensional (1D) chains, where transition metal polyhedra connect through shared corners or edges. However, Li₂Co₃(SeO₃)₄ and Li₂Mn_2.5(SeO₃)₄ exhibit distinct structural features. The former contains one type of [4 + 2] Li, two different CoO₆ octahedra, and two SeO₃ pyramids. The latter possesses one type of [5 + 1] Li, one Mn³⁺O₆ octahedron, one Mn²⁺O₅ square-pyramid, and two SeO₃ pyramids. Consequently, the lithium polyhedron undergoes unusually strong irregular distortions in the cobalt compound, but experiences strong distortions in the manganese compound. Magnetic measurements confirm that Li₂Co₃(SeO₃)₄ with a <em>S</em> = 3/2 uniform spin chain structure possess a long-range antiferromagnetic ordering and field-induced spin-flip transition at 2K, where the fitting via the Bonner–Fisher model with interchain mean-field corrections yields <em>J</em>_intra<em>/k</em>_B = -4.32(2) K, <em>J</em>_inter<em>/k</em>_B = −0.64(10) K, <em>g</em> = 2.34(3). Systematic distortion regularities in central metal cation polyhedra emerge from quantifying the ratio of SeO₃ groups to total cation polyhedra within lithium transition metal selenites.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125795"},"PeriodicalIF":3.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145836963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A mixed-ligand strategy to enhance MOF stability and functionality: Case study on copper MOFs and CO2 adsorption","authors":"Shabnam Feyziyeva ,&nbsp;Nathalie Kyritsakas-Gruber ,&nbsp;Nizami Israfilov ,&nbsp;Benoît Louis","doi":"10.1016/j.jssc.2025.125798","DOIUrl":"10.1016/j.jssc.2025.125798","url":null,"abstract":"<div><div>Two new pillared-layer mixed-ligand metal–organic frameworks (MOFs) were synthesized using 2,5-thiophene dicarboxylic acid (TDC) in combination with pyrazine (Pyr) or 1,4-diazabicyclo[2.2.2]octane (DABCO). Copper, positioned between hard and soft acids according to the HSAB theory, was selected as the metal center. Pairing the anionic carboxylate linker with neutral N-donor ligands yielded a 3D framework in the TDC–Pyr system and a 2D architecture in the TDC–DABCO system. Both materials exhibited structural phase transformations at approximately 200 °C. The MOFs were fully characterized by SCXRD, PXRD, FT-IR, TGA, nitrogen physisorption analyses, and CO₂ sorption studies. Notably, the 2D Cu-TDC-DABCO framework achieved the highest CO₂ uptake, reaching 2.5 mmol g⁻¹ at 273 K and 1.2 bar.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125798"},"PeriodicalIF":3.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145836965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Grand canonical Monte Carlo (GCMC) study and the ideal adsorbed solution theory (IAST) on adsorption performance of metal organic frameworks (MOFs) for CH4/N2 separation","authors":"Yang Yan,&nbsp;Xianglan Zhang,&nbsp;Guangtai Ding","doi":"10.1016/j.jssc.2025.125783","DOIUrl":"10.1016/j.jssc.2025.125783","url":null,"abstract":"<div><div>This computational study systematically investigates CH₄/N₂ separation in six distinct MOFs-MIL-53-Al, Cu-BTC, ZIF-8, Ni-DOBDC, ZSTU-5, and Co₃(C₄O₄)₂(OH)₂ using GCMC simulations and IAST. By correlating simulated adsorption data with structural properties, we establish clear structure-performance relationships and identify optimal materials for specific operating conditions. MIL-53-Al exhibits the highest CH₄ saturation capacity (10.5 mmol/g at 35 bar), governed by its unique structural flexibility and host-guest interactions from the organic linkers, making it ideal for high-pressure storage. In contrast, Co₃(C₄O₄)₂(OH)₂ demonstrates superior low-pressure (1 bar) CH₄ uptake (1.83 mmol/g) and the highest CH₄/N₂ selectivity (12.8), driven by strong affinity from accessible polar sites within narrow micropores (∼0.7 nm). For practical separation applications, the evaluation of working capacity under swing adsorption conditions suggests ZIF-8 as a robust candidate due to its stable, size-sieving-based selectivity and proven scalability. This work goes beyond simple performance comparison and emphasizes the crucial role of structure in selecting optimal materials, with operating pressure also being a significant factor in achieving optimal performance.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125783"},"PeriodicalIF":3.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145836973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis, structure of a three-dimensional Cd-MOF and its application in photocatalytic degradation of ofloxacin","authors":"Xiaoli Wu,&nbsp;Yuyao Wang,&nbsp;Silin Yang,&nbsp;Dawei Wang","doi":"10.1016/j.jssc.2025.125781","DOIUrl":"10.1016/j.jssc.2025.125781","url":null,"abstract":"<div><div>A novel Cd(II) metal-organic framework {[Cd(tpa)Cl]·H₂O}_n (Cd-MOF) (tpa = 5-(1H-1,2,4-triazol-1-yl)pyridine-3-carboxylic acid) was prepared via hydrothermal synthesis. X-ray single-crystal analysis revealed that, the Cd-MOF possesses an interesting three-dimensional (3D) network fabricated by Cd–Cl infinite chains and tpa^– ligands, which features a (4,6)-connected topology. The synthesized Cd-MOF exhibited outstanding photocatalytic performance in the degradation of ofloxacin (OFX) under UV light. The removal rate of OFX reached 95.7 % after 80 min of reaction, and it still remained at 85.8 % after 5 cycles. Finally, the photocatalytic mechanism was investigated by means of photocurrent test and active species quenching tests, which indicated that •OH and O₂^•− were the main active species responsible for the degradation of OFX. In addition, the luminescence and structural stability of Cd-MOF were also investigated.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125781"},"PeriodicalIF":3.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145787512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic role of Ce3+ in tellurite–borate–stannate ceramics: Dual functional photonic response and high-energy photon attenuation","authors":"P. Vinothkumar ,&nbsp;S. Praveenkumar ,&nbsp;S. Joyal Isac ,&nbsp;Paul Dhinakaran A.","doi":"10.1016/j.jssc.2025.125780","DOIUrl":"10.1016/j.jssc.2025.125780","url":null,"abstract":"<div><div>A new tellurite-based ceramic system activated by Ce³⁺, with the compositions [50TeO₂-30.25B₂O₃–10SnO₂–5MgO–4CuO-0.75Ce₂O₃(wt%) - TBSMCCe_0.75], and [50TeO₂–29B₂O₃–10SnO₂–5MgO–5CuO–1Ce₂O₃(wt%)- TBSMCCe₁] was created using a solid-state process, and its multipurpose applications in photonics and radiation shielding were thoroughly examined. Highly crystalline CuO phases were verified by structural investigation, with typical crystallite sizes ranging from 33.9 to 34.3 nm. Te–O and B–O vibrational modes were detected in Fourier Transform Infrared spectra, confirming the development of a stable oxide framework. Strong Ce³⁺-related absorption with a direct bandgap of 2.6–2.8 eV was observed by UV–Visible spectroscopy, although Photoluminescence spectra displayed wide visible emission peaking at about 350 nm. The color chromaticity coordinates for the Ce₁-doped ceramic changed from 0.2087, 0.1947 for Ce_0.75 to 0.2245, 0.1948 for Ce₁, both of which were in the blue-cyan area and had color purities of 55.9 % and 51.3 %, respectively. This indicated a greater luminescence intensity. Electron Paramagnetic Resonance evidence confirmed the presence of elevated Ce³⁺ and oxygen vacancy centers, indicating that the thermoluminescence glow curves displayed a pronounced peak at approximately 260 °C with greater intensity for Ce₁. With a mean free path ranging from 0.2 cm (0.015 MeV) to 12 cm (10 MeV) and a mass attenuation coefficient of 1.20 cm²/g at 0.015 MeV, decreasing with energy, radiation shielding investigations demonstrated superior performance for Ce₁. In order to prove effective attenuation, the half-value layer was as low as 0.25 cm at 0.05 MeV and approximately 4.5 cm at 5 MeV. around higher energies, the effective atomic number stabilized around about 15–18, after peaking at about 36 in the photoelectric region. Both the energy absorption buildup factor and the exposure buildup factor peaked at about 1 MeV (130–140 at 40 MFP), but steadily decreased for Ce₁, suggesting less photon accumulation. For integrated photonic and nuclear shielding applications, TBSMCCe₁ is a viable lead-free substitute due to its improved multifunctionality, as shown by the combined optical and shielding findings.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125780"},"PeriodicalIF":3.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145787515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Formation enthalpy of B2 and related phases of Al–Cu–Fe system","authors":"I.A. Tomilin ,&nbsp;V.V. Tcherdyntsev ,&nbsp;T.A. Sviridova ,&nbsp;V.A. Sudarchikov ,&nbsp;S.S. Alexandrova ,&nbsp;E.V. Medvedeva","doi":"10.1016/j.jssc.2025.125774","DOIUrl":"10.1016/j.jssc.2025.125774","url":null,"abstract":"<div><div>The standard enthalpies of formation of binary and ternary alloys of the Al–Cu–Fe system were obtained experimentally by the high-temperature solution calorimetry. The results are in good agreement with the theoretical and experimental literature data. The minimum enthalpies were observed at the iron contents of 60–70 at. %. This was attributed to the D0₃-type ordering characteristic of alloys with compositions close to AlFe₃. Based on the constructed enthalpy diagram, it was proposed that in the B2-ordered solid solutions of the Al–Cu–Fe system, the region with a tendency to ordering with the formation of complex superstructures shifts toward higher aluminum concentrations compared to the binary Al–Fe system. The analysis of the B2 phase lattice parameter concentration dependences showed that the lattice parameter in most cases increase as the Fe/Cu atomic ratio approached unity. It was supposed that one of the factors determining the lattice parameter is the influence of the chemical repulsion forces between Fe and Cu atoms in the crystalline structure. A comparison of the enthalpies of formation of the quasicrystalline phase of the Al–Cu–Fe system with the crystalline phases of the same system showed that the strength of the chemical bond in the quasicrystalline alloy of the system under study is close to that for solid solutions with the B2 structure with the Al/Cu ratio of 2.3–2.5 and an iron content below 50 at. %. This similarity may be due to the fact that the B2 phase of the system under study, from the point of view of local atomic configurations, can be considered as an approximant of the quasicrystalline phase.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125774"},"PeriodicalIF":3.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145734359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and carrier transport mechanism in Sol–Gel derived Gd2MnFeO6 rare earth based double perovskite: Insights into polaron hopping and grain boundary effects","authors":"Siddhartha Swarup Parida,&nbsp;Abhijeet Kumar,&nbsp;Budhendra Singh","doi":"10.1016/j.jssc.2025.125779","DOIUrl":"10.1016/j.jssc.2025.125779","url":null,"abstract":"<div><div>Rare-earth based double perovskite Gd₂MnFeO₆ (GMFO) ceramic was successfully synthesised through a modified sol-gel reaction technique involving calcination at 400 °C and sintering at 800 °C under ambient pressure conditions. X-Ray Diffraction analysis and Rietveld refinement confirmed pure orthorhombic crystal structure with space group <em>Pbnm</em> and lattice parameters <em>a</em> = 5.3274 <em>Å</em>, <em>b</em> = 5.6528 <em>Å</em>, <em>c</em> = 7.5797 <em>Å</em>, with orthorhombicity of 0.057. Scanning Electron Micrographs (SEM) revealed heterogeneous grain morphology with predominant plate-like macro structures alongside more massive crystallites, exhibiting well-defined edges and visible porosity. X-Ray Photoelectron Spectroscopy (XPS) confirmed the presence of Gd³⁺, Mn³⁺, and mixed Fe²⁺/Fe³⁺ oxidation states with binding energies of 147.97/141.69 <em>eV</em>, 641.51/653.08 <em>eV</em>, and 710.40–725.23 <em>eV</em>, respectively. Comprehensive impedance spectroscopy analysis (1 kHz–1 MHz, 30 °C–120 °C) revealed distinct grain boundary contributions above 50 °C, with bulk resistance decreasing from 511.5 Ω to 175 Ω (30 °C–80 °C), exhibiting negative temperature coefficient of resistance behaviour. The dielectric constant maxima of ∼800 with excellent thermal stability below 100 °C was seen. AC conductivity analysis yielded activation energy for conduction of 0.286 eV, while electrical modulus analysis revealed enhanced short-range carrier mobility at higher frequencies. Variable Range Hopping (VRH) analysis confirmed polaron-dominated charge transport with hopping lengths ranging from 11.5 to 13 Å: a characteristic of small polaron transport in rare-earth double perovskites. The observed transport mechanisms demonstrate strong correlation between synthesis-induced microstructural features and electrical properties, positioning GMFO as a promising candidate for next-generation electronic applications.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125779"},"PeriodicalIF":3.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145787514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}