Journal of Materials Science: Materials in Electronics最新文献

{"title":"Experimental and DFT study of oxygen vacancy modulation in Bi2MoO6 for enhanced photocatalytic reduction of Cr(VI)","authors":"Tong Zhang,&nbsp;Pengyu Zhang,&nbsp;Jinping Zhang,&nbsp;Hongwei Wang,&nbsp;Renhong Yu,&nbsp;Yunfei Zang,&nbsp;Joshi Mahesh Kumar,&nbsp;Zhiping Mao,&nbsp;Xinli Li","doi":"10.1007/s10854-026-18535-8","DOIUrl":"10.1007/s10854-026-18535-8","url":null,"abstract":"<div><p>Hexavalent chromium (Cr(VI)) in wastewater poses a serious threat to the environment and human health. The Bi₂MoO₆ microspheres prepared by the solvothermal method are poorly crystalline, featuring imperfect grain development and abundant intrinsic defects, which severely impair their photocatalytic performance. The effects of systematically regulating the annealing temperature on the grain size and micromorphology of solvothermally synthesized Bi₂MoO₆ were investigated. The sample annealed at 400 °C exhibits moderate grain size, well‑defined flower‑like microspheres, a moderate oxygen vacancy concentration, the highest photocurrent density (0.45 μA/cm²), and the lowest charge‑transfer impedance. It achieves a Cr(VI) reduction efficiency of 59.4% with a rate constant of 0.01171 min⁻¹. According to the analysis of photocatalytic mechanism, the photogenerated electrons and superoxide radicals generated by light have a strong reducing ability to convert Cr(VI) into Cr(III). Density functional theory (DFT) calculations show that the effect of oxygen vacancies enhances the separation and transport of charge carriers. This work provides a theoretical basis and design strategy for the annealing modification of solvothermally synthesized Bi₂MoO₆ photocatalysts toward efficient Cr(VI) photoreduction.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 29","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evolution of resistive switching behavior regulated by GaOxN1−x interfacial engineering","authors":"Pingyang Huang,&nbsp;Zeliang Hong,&nbsp;Wanlong Ren,&nbsp;Shuai Zhao,&nbsp;Yingnan Zhang,&nbsp;Qingpeng Hu,&nbsp;Yuxin Zhao,&nbsp;Dawei Li,&nbsp;Xin Xia,&nbsp;Kaiming Ma,&nbsp;Lili Geng,&nbsp;Hongyan Hai,&nbsp;Jiaqi Lin,&nbsp;Yanhong Liu,&nbsp;Guojun Yuan,&nbsp;Jianxun Dai,&nbsp;Huolin Huang","doi":"10.1007/s10854-026-18614-w","DOIUrl":"10.1007/s10854-026-18614-w","url":null,"abstract":"<div><p>This work examines the effects of post-treatment on the surface morphology, interfacial chemistry, and switching mode of Ag/GaN/ITO memristors. The devices consist of an ITO bottom electrode, a 74 nm GaN functional layer, and an Ag top electrode. The untreated, air-annealed (350 °C, 40 min), and O₂ plasma-treated (10 W, 60 s) devices are denoted as Group 1, Group 2, and Group 3, respectively. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) show that both post-treatments improve surface uniformity and reduce roughness, with Group 3 being the smoothest. X-ray diffraction (XRD) detects no newly formed crystalline phase. Electrical measurements over 100 SET/RESET cycles per group show irregular bipolar switching in Group 1, relatively gradual SET in Group 2, and abrupt SET/RESET transitions in Group 3. Resistance state stability was evaluated using 1000-times read pulses per state at 0.10 V and 50 Hz. Group 3 exhibits an HRS range of 325.40–331.39 kΩ, a resistance ratio of 1.20 × 10⁴, and the lowest HRS readout coefficient of variation (CV) of 0.36%. XPS further reveals enhanced surface oxygen enrichment after treatment, accompanied by an increased O/Ga ratio and slight positive shifts in the O 1<i>s</i> and Ga 2<i>p</i>_3/2 binding energies. An interface-modulated Ag-mediated filament mechanism is proposed to explain the switching mode differentiation, supported by compact model and thermodynamic analyses. These results show that post-treatment can control the switching mode of GaN-based memristors.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 29","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A dual-additive strategy based on a π-conjugated thiazolyl-azo molecule and carbon nanotubes for efficient inverted organic solar cells","authors":"Haifa S. Al Ghamdi,&nbsp;AL. Masri Walaa,&nbsp;E. Salim","doi":"10.1007/s10854-026-18611-z","DOIUrl":"10.1007/s10854-026-18611-z","url":null,"abstract":"<div><p>Further improvements in organic solar cells (OSCs) performance focus on enhancing molecular packing, facilitating charge transport, and reducing recombination processes within the active layer. Herein, a dual-additive system consisting of a 2-(2-Thiazolylazo)-p-cresol (TAC) and multi-walled carbon nanotubes (MWCNTs) was incorporated into poly[N-9′-heptadecanyl-2,7-carbazole-alt-5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)]:[6, 6] -Phenyl-C₆₁-butyric acid methyl ester (PCDTBT:PC₆₁BM) bulk heterojunction (BHJ) to simultaneously modify their morphological and electronic properties. The incorporation of TAC and MWCNTs provides a synergistic effect that improves molecular packing, enhances the donor/acceptor interfacial morphology, and creates continuous pathways for charge transport throughout the active layer. Structural, optical, electrical, and photovoltaic investigations demonstrated that the developed active layers exhibit stronger absorption in the visible region, reduced photoluminescence (PL) intensity, enhanced charge-carrier mobility, and more efficient collection of photogenerated charges with lower recombination losses. The optimized quaternary device delivered a power conversion efficiency (PCE) of 8.63 ± 0.13%, corresponding to an enhancement of approximately 42.6% relative to the pristine device 6.05 ± 0.01%, together with simultaneous improvements in the open-circuit voltage (V_OC), short-circuit current density (J_SC), and fill factor (FF). The enhanced device performance results from the combined influence of TAC and MWCNTs, which improves molecular packing, introduces efficient charge transport pathways, and promotes effective exciton dissociation and charge collection. In conclusion, this work establishes an effective dual-additive approach for enhancing the performance of OSCs. The findings also provide a deeper understanding of the combined role of π-conjugated molecular additives and conductive carbon nanostructures in the design of efficient OSCs.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 29","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic enhancement of charge storage in graphene oxide/lanthanum oxide-based supercapacitor electrodes","authors":"M. Taqi Qaeemy,&nbsp; Manisha,&nbsp;Kamal Kishore,&nbsp;S. P. Nehra,&nbsp;Anshu Sharma","doi":"10.1007/s10854-026-18558-1","DOIUrl":"10.1007/s10854-026-18558-1","url":null,"abstract":"<div><p>This study details the hydrothermal synthesis of graphene oxide/lanthanum oxide (GLO) composite, by methodically varying the concentration of La₂O₃ to examine its impact on the composite’s electrochemical performance. The composites were characterized using Field Emission Scanning Electron Microscopy (FESEM), High Resolution Transmission Electron Microscopy (HRTEM), X-Ray Photoelectron Spectroscopy (XPS), X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Raman Spectroscopy, Brunauer–Emmett–Teller (BET) surface area analysis, and energy dispersive X-ray spectroscopy (EDS). Electrochemical performance was conducted using Cyclic Voltammetry (CV), Galvanostatic Charge–Discharge (GCD), and Electrochemical Impedance Spectroscopy (EIS) measurements in a two and three-electrode configuration in 1 M H₂SO₄ electrolyte. The results exemplify that La₂O₃ concentration significantly influences the electrochemical properties of the GLO composites. Among all the composites, the optimized GLO100 sample exhibited the highest specific capacitance of 2100 and 697 F g⁻¹ at 1 A g⁻¹ in three and two-electrode setups, respectively, outperforming GLO25, GLO150, and GLO300, with excellent capacitance retention of over 10,000 cycles. These results suggest the potential of optimized GLO composites as a promising electrode material for high-performance supercapacitors.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 29","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication of high-performance supercapacitor using biomass (Aegle marmelos’s fruit shell)-derived activated carbon for sustainable energy storage","authors":"Manish K. Singh,&nbsp;Satnamkaur Mattu,&nbsp;Hiranya Mahato,&nbsp;Shilpi Kumari,&nbsp;Manisha Kumari,&nbsp;Manisha Santoshrao Tak,&nbsp;Abhay Deshmukh,&nbsp;Rajalingam Thangavel,&nbsp;Dilip K. Singh","doi":"10.1007/s10854-026-18573-2","DOIUrl":"10.1007/s10854-026-18573-2","url":null,"abstract":"<div><p>Biomass is increasingly recognized as a sustainable, eco-friendly, and cost-effective source for the development of electrode materials in energy storage applications. In the present work, activated carbon is synthesized from the biological waste of <i>Aegle marmelos</i>'s fruit shells (AMFS) and its application in high-performance supercapacitors is investigated for the first time. The AMFS-based biomass carbon electrode exhibits a remarkable specific capacitance of 454.5 Fg⁻¹ at a current density of 0.25 Ag⁻¹ in a three-electrode configuration. FESEM and BET analyses confirm the presence of a well-developed porous structure in the as-synthesized activated carbon. The fabricated symmetric supercapacitor cell delivers a specific capacitance of 131.92 Fg⁻¹ at a current density of 0.25 Ag⁻¹. Furthermore, the symmetric device demonstrates an outstanding power density of 8005.36 Wkg⁻¹ at an energy density of 9.96 Wh kg⁻¹, with negligible capacitance loss during prolonged cycling (10,000 cycles). Electrochemical stability tests reveal excellent retention of the symmetric supercapacitor cell, maintaining 100% of its initial capacitance after 10,000 charge-discharge cycles in 1 M H₂SO₄ electrolyte. The symmetric supercapacitor cell also exhibits a high-rate capability of 95.27% and maintains a coulombic efficiency of 93.4% when operated at a current density of 0.5 Ag⁻¹, demonstrating its strong potential as a viable electrode material for next-generation supercapacitor technologies.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 29","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Concave crystal engineering-driven fast diffusion doping leads to a high thermoelectric performance in PbSe","authors":"Jiali Ren,&nbsp;Decheng An,&nbsp;Fangyuan Chen,&nbsp;Zhijun Hao,&nbsp;Jiaxi Song,&nbsp;Junjie Wang,&nbsp;Shaoping Chen,&nbsp;Xian-Ming Zhang","doi":"10.1007/s10854-026-18653-3","DOIUrl":"10.1007/s10854-026-18653-3","url":null,"abstract":"<div><p>D-block transition metal-doped PbSe has emerged as a promising thermoelectric conversion material. However, its doping efficiency was constrained by the long-period and high-temperature melting and/or annealing procedure. In this work, we demonstrate a novel concave crystal approach to realize fast diffusion doping. We first found that the PbSe product obtained under crystallization kinetics control was not limited through thermodynamic confinement, allowing for the formation of microcrystals with concave surfaces and without obvious residual organics. The 5-min diffusion doping induced uniformly distributed Ag and Ti elements in the PbSe matrix, which results in the improved electron carrier concentration (~ 10¹⁹ cm⁻³) and thus suppressed bipolar effect at high temperatures. The resulting multiscale defect architectures, including grain boundaries, dislocations, and point defects, lead to a minimum lattice thermal conductivity of ~0.5 W m⁻¹ K⁻¹ at 750 K, approaching the amorphous limit of PbSe. A high <i>zT</i> of ~1.32 at around 800 K was achieved in the representative Ag/TiO₂ co-doped PbSe (LSTSe−1), ~383% magnitude larger than that of pristine PbSe. The LSTSe−1 sample also exhibits satisfactory reproducibility. This work establishes a facile and eco-friendly route for synthesizing n-type PbSe-based thermoelectric materials.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 29","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Degradable AgNWs/MWNT nanocomposite electrodes supported on pomelo peel for formaldehyde sensing","authors":"Na Li,&nbsp;Zhihuan Weng,&nbsp;Siyuan Dong,&nbsp;Zhihao Ma,&nbsp;Wenxuan Chen,&nbsp;Shuhua Chen,&nbsp;Cheng Liu,&nbsp;Xiuping Li","doi":"10.1007/s10854-026-18584-z","DOIUrl":"10.1007/s10854-026-18584-z","url":null,"abstract":"<div><p>Degradable electrode materials are needed to reduce the environmental burden associated with disposable electrochemical devices. Herein, a pomelo peel (PP)-supported silver nanowire/multi-walled carbon nanotube (AgNWs/MWNTs) nanocomposite electrode is prepared by alternating drop-casting AgNWs and MWNTs onto the porous albedo of waste pomelo peel. The PP substrate provides a low-cost biomass scaffold with naturally porous structure and oxygen-containing groups, facilitating the anchoring of the conductive nanonetwork. Scanning electron microscopy, energy-dispersive spectroscopy, X-ray photoelectron spectroscopy, and X-ray diffraction are used to examine the substrate structure and nanocomposite layer, while electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and differential pulse voltammetry (DPV) are used to evaluate electrode behavior. The AgNWs/MWNT/PP electrode is further assessed for formaldehyde (HCHO) sensing in alkaline medium, showing linear response over 2–70 mM and 0–10 µM, apparent sensitivity of 642 µA mM⁻¹ cm⁻², estimated detection limit of 2.69 µM, relative standard deviation of 4.33, and 91.1% current retention after 20 days. Soil-burial tests show rapid mass loss of the PP-based electrode, with 58.53% residual mass after 3 days and no intact electrode remaining after 33 days. This work highlights a biomass-derived, degradable substrate strategy for nanocomposite electrochemical electrodes.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 29","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Review on regulation systems for energy storage performance of high-entropy multilayer ceramics","authors":"Yong Jiang,&nbsp;Rongli Gao","doi":"10.1007/s10854-026-18619-5","DOIUrl":"10.1007/s10854-026-18619-5","url":null,"abstract":"<div><p>High-entropy multilayer ceramic capacitors (HE-MLCCs) are the main energy storage components in high-power pulsed electronic systems, yet conventional lead-free dielectrics face inherent trade-offs between polarization intensity and breakdown strength, along with low efficiency and poor temperature stability. Centered on “regulation scale” as the organizing thread, this review establishes a four-level regulation framework for the energy storage performance of high-entropy multilayer ceramics. Intrinsic atomic-scale regulation covers compositional design, configurational entropy engineering, phase structure manipulation, and defect engineering. Nano/microscale microstructure regulation includes grain-boundary engineering, texturing control, and polar nanoregion (PNR) construction. Macroscopic device-scale regulation focuses on multilayer structural parameters and electrode–dielectric interfaces. Full-process fabrication regulation encompasses powder synthesis, tape casting, and sintering optimization. Analysis suggests that the high-entropy strategy can decouple polarization and breakdown resistance through configurational entropy-induced lattice disorder and PNR formation, a mechanism proposed as the dominant pathway for simultaneously boosting recoverable energy density (<i>W</i>_rec) and efficiency (<i>η</i>). Overcoming single-dimensional bottlenecks requires regulation at several scales, with representative advances including a high <i>W</i>_rec of 182 J/cm³ in high-entropy thin films (at 6.35 MV/cm) and <i>W</i>_rec = 22.92 J/cm³ with <i>η</i> = 97.1% in optimized co-fired high-entropy MLCCs (at 1200 kV/cm). Several challenges remain, including ambiguous entropy–structure correlations, costly high-throughput screening, poor co-firing compatibility, and difficulty controlling ultrathin layer thickness. Distinct from existing reviews organized by single material systems, this work reviews 12 regulation strategies across four hierarchical scales and analyzes their cascade and synergistic mechanisms. It proposes five frontier directions (quantitative entropy characterization, cross-scale inverse design, industrial engineering, novel high-entropy dielectric systems, and multi-field coupled reliability evaluation), thereby providing systematic theoretical guidance for the rational design of high-entropy multilayer energy-storage ceramics.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 29","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of electrical conductivity in poly(2-ethylaniline)/graphene-based nanocomposites via response surface methodology and DFT-based computational ınvestigation","authors":"Duygu Anaklı,&nbsp;Mehtap Erşan,&nbsp;Savaş Kaya,&nbsp;Konstantin P. Katin","doi":"10.1007/s10854-026-18657-z","DOIUrl":"10.1007/s10854-026-18657-z","url":null,"abstract":"<div><p>Conductive reduced graphene oxide–poly(2-ethylaniline) (RGO-g-PEAn) and few-layer graphene–PEAn (FLG-g-PEAn) nanocomposites were synthesised via graphene-assisted in situ polymerisation of 2-ethylaniline. The reactive surfaces of RGO and FLG facilitated oxidant-free polymerisation, highlighting the active role of graphene nanosheets during polymerisation and in the formation of conductive percolation networks that enhance charge transport. In this study, response surface methodology (RSM) of the central composite design (CCD) was employed to optimise the effects of two variables on the electrical conductivity of the nanocomposites. The variables in question were polymerisation time (2–10 days) and graphene-based nanomaterial loading (20–100 mg). RSM ascertained the optimum conditions in terms of polymerisation time and graphene loading: 4.353 days and 91.812 mg RGO for RGO-g-PEAn, and 5.548 days and 92.291 mg FLG for FLG-g-PEAn. Morphological analysis by transmission electron microscopy (TEM) revealed interfacial interactions between PEAn chains and graphene surfaces and the formation of interconnected conductive networks in the nanocomposites. RGO-g-PEAn and FLG-g-PEAn exhibited RSM-predicted electrical conductivities of 4.32 × 10⁻¹ and 1.764 S cm⁻¹, respectively, which were approximately six orders of magnitude higher than that of pristine PEAn (5.29 × 10⁻⁷ S cm⁻¹) at the optimum conditions. Furthermore, density functional theory (DFT) calculations were performed to investigate the charge transfer capabilities of the synthesised composites, providing theoretical support for the experimentally observed structure–property relationships. The findings of this study demonstrate that a combination of graphene-assisted oxidant-free polymerisation, together with RSM optimisation and DFT analysis, provides an effective strategy for developing conductive PEAn/graphene nanocomposites for electronic applications.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 29","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced coercivity and reflection loss in Cu-doped M-type barium hexaferrites for microwave absorption applications","authors":"Yaseen Mohd,&nbsp;Deepika Sharma,&nbsp;Rohit Duglet,&nbsp;Vijay Singh,&nbsp;Sonia Khan,&nbsp;Sagar E. Shirsath,&nbsp;M. Singh,&nbsp;Indu Sharma","doi":"10.1007/s10854-026-18488-y","DOIUrl":"10.1007/s10854-026-18488-y","url":null,"abstract":"<div><p>The rapid development of electrical vehicles and the demand for high-frequency electromagnetic interference shielding have become critical challenges in the development of reliable green energy infrastructure. In this regard, copper-doped M-type hexagonal ferrites with composition Ba_1–xCu_xFe₁₂O₁₉, where <i>x</i> = (0.00, 0.02, 0.04, 0.06, 0.08), were produced using the citrate precursor method. X-ray diffraction (XRD) was used to assess the structure of the single-phase Ba-hexaferrite. The formation of hexagon-shaped platelets with an average grain size between 0.49 and 0.76 μm was verified by scanning electron microscopy (SEM). The highest coercivity of 2.6 kOe was found for <i>x</i> = 0.06, compared to 1.37 kOe for pure samples. The remanent magnetization has increased from 16.52 emu/g to 21.38 emu/g. The real value of permittivity increases with increasing composition and frequency range. At <i>x</i> = 0.06 composition, <i>ε</i>՜ reaches the value of 7.5 at a frequency of 12 GHz with the loss factor of 0.3. The highest value of permeability, i.e., 1.324, is achieved in pure Ba-hexaferrite with a loss factor of 0.121. The RL_min peaks at − 32.95 dB with a thickness of 6.5 mm at 12.2 GHz at the maximum dopant concentration, <i>x</i> = 0.08. These results demonstrate that Cu-substituted BaM hexaferrites exhibit enhanced magnetic and electromagnetic properties, positioning them as suitable candidates for high-performance magnetic and microwave absorption applications for green energy infrastructure.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 29","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}