Physica B-condensed Matter最新文献

{"title":"Role of rGO reinforced Er-WO3 in biological, photocatalytic, luminescence and forensic applications","authors":"V. Harshitha ,&nbsp;D. Suresh","doi":"10.1016/j.physb.2025.417518","DOIUrl":"10.1016/j.physb.2025.417518","url":null,"abstract":"<div><div>The advancement of multifunctional heterostructured nanocomposites has garnered significant attention due to their promising applications. In this study, multifunctional WO₃, Erbium-doped WO₃ (Er-WO₃), and Er-WO₃/reduced graphene oxide (Er-WO₃/rGO) composites were synthesized using the solution combustion method, with Jamaican cherry <em>(Muntingia calabura</em>) fruit juice serving as a bio-template. The structural, optical, and morphological properties of the synthesized nanomaterials were characterized through Fourier-transform infrared spectroscopy (FTIR), powder X-ray diffraction (PXRD), and ultraviolet–visible diffuse reflectance spectroscopy (UV-DRS), Raman spectroscopy, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and transmission electron microscopy (TEM). The photocatalytic efficiency of the materials in dye degradation was investigated, revealing that Er-WO₃/rGO exhibited superior performance compared to its undoped and doped counterparts, achieving a 94.9 ± 4.75 % degradation of Methylene Blue (MB) dye within 150 min. The photoluminescence spectra of Er-WO₃/rGO demonstrated efficient charge carrier separation. Furthermore, Er-WO₃/rGO facilitated the visualization of latent fingerprints, displaying well-defined ridge patterns with high resolution. Antibacterial activity assessments against <em>Escherichia coli</em> and <em>Staphylococcus aureus</em> revealed inhibition zones of 13.66 ± 1.15 mm and 14.33 ± 0.57 mm, respectively, following 12 h of incubation. Additionally, Er-WO₃ and Er-WO₃/rGO exhibited antioxidant activity against DPPH (2, 2-diphenyl-1-picrylhydrazyl) free radicals, with IC₅₀ values of 4899 μg/mL and 4000 μg/mL, respectively. The incorporation of Erbium (Er) into the WO₃ crystal lattice led to a reduction in crystallite size and bandgap energy, enhancing its functional properties. Meanwhile, the inclusion of rGO contributed to increased porosity and electrical conductivity, further promoting charge separation within the photocatalyst. Overall, this study introduces a novel approach for the development of multifunctional Er-WO₃/rGO nanohybrids, highlighting their potential for applications in photoluminescence, latent fingerprint detection, photocatalytic dye degradation, antibacterial activity, and antioxidant functionality.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"715 ","pages":"Article 417518"},"PeriodicalIF":2.8,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First principle investigation of pressure-dependent structural stability of double perovskite Cs2GeMnM6 (M = Cl, Br, I) at elevated temperatures","authors":"Shabir Ali ,&nbsp;Zuhra Tayyab ,&nbsp;Xinhua Wang ,&nbsp;Amjad Almunyif ,&nbsp;Shahid Sharif ,&nbsp;M.A.K.Y. Shah ,&nbsp;Rawaid Ali ,&nbsp;Khuloud A. Alibrahim","doi":"10.1016/j.physb.2025.417529","DOIUrl":"10.1016/j.physb.2025.417529","url":null,"abstract":"<div><div>Double perovskites (DPs) are widely used in a range of commercial and industrial fields due to their exceptional structural stability in thermoelectric devices. To address this performance, we explored the structural stability of Cs₂GeMnM₆ (M = Cl, Br, I) DPs compound under different pressure and temperature conditions through first-principles simulations. The structure, mechanical and optical properties were optimized by using the PBE-GGA potential technique, and the thermal stability was evaluated using the Gibbs2 package implemented in the WIEN2K code. The computed results regarding ground state energy and bulk modulus demonstrate that the Cs₂GeMnCl₆ DP compound structure exhibits greater stability compared to the Cs₂GeMnBr₆ and Cs₂GeMnI₆ DPs, however thermodynamic analyses involving Gibbs free energy and enthalpy suggest that the Cs₂GeMnI₆ DPs compound possess enhanced structural stability under specific pressure and temperature conditions. The results reveal that Cs₂GeMnCl₆ DP compound exhibit higher stability based on electronic behavior, while Cs₂GeMnI₆ DP compound display greater stability in terms of vibrational motion, and making them more appropriate for thermoelectric applications under elevated temperature and pressure conditions.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"714 ","pages":"Article 417529"},"PeriodicalIF":2.8,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of samarium oxide on structural, ultrasonic, and shielding characteristics of zinc lead phosphate glasses","authors":"I.S. Mahmoud ,&nbsp;M.S. Gaafar ,&nbsp;S.Y. Marzouk ,&nbsp;A. Okasha ,&nbsp;H.M. Elsaghier","doi":"10.1016/j.physb.2025.417526","DOIUrl":"10.1016/j.physb.2025.417526","url":null,"abstract":"<div><div>This study investigated the structural, elastic, and shielding properties of a series of (100-<em>x</em>)[9.58ZnO-24.47PbO-65.95P₂O₅]-<em>x</em>Sm₂O₃ glasses (with <em>x</em> = 0, 0.45, 0.89, 1.32, and 2.61 mol%). Fourier Transform Infrared (FTIR) spectroscopy and density measurements were used for structural characterization. Ultrasonic velocities, measured via the pulse echo technique at 4 MHz and ambient temperature, allowed for the calculation of elastic moduli, Poisson's ratio, Debye temperature, and microhardness. The research analyzed how varying concentrations of Sm₂O₃ influenced the structural and elastic behavior of these glasses. Bond compression and Makishima-Mackenzie models were applied to quantitatively analyze the experimental data and gain structural insights. The mass attenuation coefficient showed maximum and minimum values at 15 keV and 6 MeV, respectively, across all glass compositions. The linear attenuation coefficient increased with increasing Sm₂O₃ content. The half-value layer of all glasses was less than that of ordinary concrete and RS-360 reference shielding materials, indicating enhanced photon absorption and potential as more efficient radiation shielding materials.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"714 ","pages":"Article 417526"},"PeriodicalIF":2.8,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation on crystal structure, electronic and optical properties of V-rich V3X (X = Al, Si, Ge) Heusler alloys","authors":"Evgenii D. Chernov ,&nbsp;M. Vasundhara ,&nbsp;Yury V. Knyazev ,&nbsp;Yury I. Kuz'min ,&nbsp;Elena B. Marchenkova ,&nbsp;Vyacheslav V. Marchenkov ,&nbsp;Alexey V. Lukoyanov","doi":"10.1016/j.physb.2025.417525","DOIUrl":"10.1016/j.physb.2025.417525","url":null,"abstract":"<div><div>The vanadium-rich Heusler alloys V₃X (X = Al, Si, Ge) have been synthesized and investigated. The crystal structure, optical and electronic structures were studied and compared. Using X-ray diffraction analysis, it was found that V₃Al alloy has the D0₃ structure, and the V₃Si and V₃Ge compounds have the A15 one, also called the β-tungsten structure. It was shown that depending on both the p-element and crystal structure alloys exhibit different properties. The V₃Al alloy crystallized in the D0₃ structure is characterized by the electronic structure of a gapless semiconductor with vanadium magnetic moments equal to 1.36(−1.36) μ_B completely compensated zero total magnetic moment, whereas, V₃Si and V₃Ge crystallized in the A15 structure exhibit metallic properties with zero magnetic moments. The optical characteristics of V₃X (X = Al, Si, Ge) were studied for the first time using the ellipsometry method. The optical conductivity of the alloys was found to be mostly produced by transitions involving V 3d electrons, was found in good agreement with the theoretical results reproducing specific features of each alloy.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"714 ","pages":"Article 417525"},"PeriodicalIF":2.8,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144501737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First principle study of the optoelectronic, and thermoelectric properties of novel direct band gap ternary chalcogenides","authors":"Banat Gul ,&nbsp;Mohannad Mahmoud Ali Al-Hmoud ,&nbsp;Muhammad Salman Khan ,&nbsp;Gulzar Khan ,&nbsp;Siti Maisarah Aziz ,&nbsp;Ghlamallah Benabdellah ,&nbsp;Ayed M. Binzowaimil","doi":"10.1016/j.physb.2025.417528","DOIUrl":"10.1016/j.physb.2025.417528","url":null,"abstract":"<div><div>Due to their distinctive crystal structures and the interaction of their constituent elements, ternary chalcogenides, have tunable electronic, optical, and thermoelectric properties. In this work, we employ first-principles calculations to investigate the structural, electronic, optical, and thermoelectric properties of novel Ga₂TeM₂ (M = S, Se) materials. Based on our results, both materials have visible-range direct band gaps, which enables them to be applied in optoelectronic and photovoltaic systems. Their structural stability and synthesizability are confirmed by the calculated cohesive and formation energies. High absorption coefficients and strong photon-matter interactions are shown by in-depth optical investigations, underscoring their potential for solar energy harvesting. Promising thermoelectric figures of merit values are also obtained via thermoelectric performance evaluation, which shows favorable Seebeck coefficients, high electrical conductivity, and low thermal conductivity. The electronic band structure and thermoelectric efficiency are affected when sulfur is substituted with selenium, offering adaptability for certain applications. This comprehensive study highlights that both materials as flexible with significant potential in clean energy technologies such as thermoelectrics and photovoltaics. Our investigation bridges the gap between theoretical predictions and real-world implementations in green energy solutions by offering insightful information on the design and development of these high-performance energy harvesting materials.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"714 ","pages":"Article 417528"},"PeriodicalIF":2.8,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Solvothermal synthesis of PVP-assisted CuS structures for sunlight-driven photocatalytic degradation of organic dyes","authors":"Vishal Dhiman ,&nbsp;Suresh Kumar ,&nbsp;Abhishek Kandwal ,&nbsp;Pankaj Sharma ,&nbsp;Ankush Thakur ,&nbsp;Sanjay Kumar Sharma","doi":"10.1016/j.physb.2025.417520","DOIUrl":"10.1016/j.physb.2025.417520","url":null,"abstract":"<div><div>Utilizing polymers in the synthesis process enhances the growth and variety of the semiconductor structures which increases their effectiveness in reducing environmental pollution. The ball-shaped CuS semiconductor structures were synthesized via solvothermal technique by varying the amount of PVP additive. The impact of PVP on the synthesis of CuS structures was investigated using XRD, FE-SEM, TEM, EDS, XPS, Raman, FT-IR, and UV–visible spectroscopic techniques. XRD analysis identified a polycrystalline hexagonal structure in the synthesized structures. FE-SEM revealed that these structures have spherical ball shapes containing flaky nanoparticles. EDS study reveals that PVP-assisted CuS structures are slightly copper-rich and have Cu:S (<em>at.</em>%) of 60:40. XPS analysis showed that in the synthesized material Cu element exists in two states <em>i.e.</em>, Cu (II) and Cu(I). A broad absorption spectrum of CuS structures was observed within the 330–750 nm wavelength range with an absorption edge at ∼330 nm. Moreover, the photocatalytic degradation activity of PVP-assisted CuS against methylene blue and crystal violet organic dyes was investigated under natural sunlight conditions without any additive.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"714 ","pages":"Article 417520"},"PeriodicalIF":2.8,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144365534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Antiferromagnetism and piezoelectricity in Janus PdXY monolayers","authors":"Asghar Ali Jan ,&nbsp;Gul Rahman ,&nbsp;Imed Boukhris ,&nbsp;M.S. Al-Buriahi ,&nbsp;Norah Alomayrah","doi":"10.1016/j.physb.2025.417492","DOIUrl":"10.1016/j.physb.2025.417492","url":null,"abstract":"<div><div>The structural, electronic, magnetic, mechanical, and piezoelectric properties of Janus PdXY (<span><math><mrow><mi>X</mi><mo>,</mo><mi>Y</mi><mo>=</mo><mtext>F, Cl, Br</mtext></mrow></math></span>) monolayers are investigated. Electron localization function (ELF) and charge density difference confirm that all PdXY Janus monolayers have ionic character. Non-uniform ELF in these monolayers is attributed to the breakdown of inversion and reflection symmetry. Elastic constants and phonon calculations reveal the mechanical and dynamic stability of these monolayers . With non-zero piezoelectric stress tensors, the maximum magnitude of <span><math><msub><mrow><mi>d</mi></mrow><mrow><mn>22</mn></mrow></msub></math></span> (9.90 pmV⁻¹) is found in the PdFBr monolayer, whereas the in-plane piezoelectric coefficient <span><math><msub><mrow><mi>e</mi></mrow><mrow><mn>22</mn></mrow></msub></math></span> has the largest value of <span><math><mrow><mn>2</mn><mo>.</mo><mn>15</mn><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mo>−</mo><mn>10</mn></mrow></msup></mrow></math></span> C/m in Janus PdFBr. All these Janus monolayers are magnetic semiconductors with magnetic moments of 2 <span><math><msub><mrow><mi>μ</mi></mrow><mrow><mi>B</mi></mrow></msub></math></span>, which are mainly contributed by the <span><math><msub><mrow><mi>E</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span> orbitals of Pd. PdBrCl shows an in-plane easy axis of magnetization, whereas monolayers PdBrF and PdClF show an out-of-plane easy axis of magnetization. The Curie temperatures, using Monte Carlo simulations, for PdBrCl, PdBrF, and PdClF are 660 K, 102 K, and 111 K, respectively.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"714 ","pages":"Article 417492"},"PeriodicalIF":2.8,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144501100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Grain modification approaches in mixed-valence manganites toward enhanced LFMR","authors":"L.N. Lau ,&nbsp;X.T. Hon ,&nbsp;K.P. Lim ,&nbsp;M.M. Awang Kechik ,&nbsp;S.K. Chen ,&nbsp;N.B. Ibrahim ,&nbsp;M.K. Shabdin ,&nbsp;A.H. Shaari ,&nbsp;C.F. Dee ,&nbsp;E.Y. Chang ,&nbsp;M. Miryala","doi":"10.1016/j.physb.2025.417516","DOIUrl":"10.1016/j.physb.2025.417516","url":null,"abstract":"<div><div>Mixed-valence manganites have attracted considerable attention due to their remarkable colossal magnetoresistance (CMR) effect, which makes them promising candidates for magnetic sensing and spintronic applications. However, the CMR effect is typically significant only at high magnetic fields near the Curie temperature, limiting its practical utility. As a result, enhancing low-field magnetoresistance (LFMR) has become a critical focus in manganite research. Grain modification has emerged as a practical approach for LFMR enhancement, primarily by promoting spin-polarised tunnelling across grain boundaries. This review presents recent progress in grain modification for enhanced LFMR in mixed-valence manganites, covering grain size reduction in manganite compounds and the incorporation of secondary phases into manganite composites. We analyse how these methods influence magnetotransport properties, particularly emphasising the interplay between the double exchange (DE) mechanism and Jahn-Teller (J-T) distortion. Despite promising results, challenges remain in controlling grain boundary characteristics and achieving significant LFMR at room temperature. The review also identifies key research gaps and proposes future directions. This work aims to consolidate current understanding and stimulate further advancements in designing high-performance manganite-based materials for spintronic applications.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"714 ","pages":"Article 417516"},"PeriodicalIF":2.8,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144365533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improved ultraviolet photodetection and oxygen gas sensing performance using CeO2 rare-earth oxide thin films deposited on GaN","authors":"Nanda Kumar Reddy Nallabala ,&nbsp;K. Rahim Bakash ,&nbsp;Rakha Saputra ,&nbsp;T.V.K. Karthik ,&nbsp;M. Ramprasad Reddy ,&nbsp;G. Gopi Krishna ,&nbsp;N. Ravi ,&nbsp;Kevin Rueda Castellanos ,&nbsp;Venkata Krishnaiah Kummara ,&nbsp;Gedi Sreedevi ,&nbsp;Salh Alhammadi ,&nbsp;Vasudeva Reddy Minnam Reddy ,&nbsp;Sunil Singh Kushvaha","doi":"10.1016/j.physb.2025.417514","DOIUrl":"10.1016/j.physb.2025.417514","url":null,"abstract":"<div><div>In recent years, high-<em>k</em> dielectric oxide-based metal-insulator-semiconductor (MIS) heterojunctions gain increasing attention due to their potential for dual functionality in ultraviolet (UV) photodetectors (PDs) and gas sensors, offering promising applications in next-generation optoelectronic and sensing technologies. This work presents the fabrication and performance of a vertical Au/CeO₂/GaN heterojunction device for both UV photodetection and oxygen sensing applications. Grazing incidence X-ray diffraction (GIXRD) confirms the formation of cubic-phase CeO₂, while field emission scanning electron microscopy (FESEM) reveals a uniform distribution of CeO₂ clusters on the GaN substrate, indicating a well-developed surface morphology. X-ray photoelectron spectroscopy (XPS) verifies the elemental composition and chemical states of Ce³⁺ and O²⁻. The photodetection properties are evaluated through I-V (dark and UV-illuminated), external quantum efficiency (EQE), detectivity (D∗), responsivity and time-resolved (I-t) measurements. Under 365 nm illumination at 3 V bias, the Au/CeO₂/GaN device post-annealed at 500 °C exhibits a responsivity of 13 A/W, an EQE ranging from 4.8 × 10² to 1.1 × 10³ % and a D∗ of 1.4 × 10¹⁴ Jones. Time-resolved measurements at 0 V show a response time of 80 ms and a recovery time of 480 ms for the 500 °C post-annealed device. For gas sensing, the same heterojunction undergoes exposure to 100 % O₂, 100 % CO₂, 1000 ppm NO and 500 ppm SO₂. The 500 °C post-annealed device demonstrates enhanced sensitivity to oxygen with response values of 0.47, 0.72, 0.77 and 0.82 for 25 %, 50 %, 75 % and 100 % O₂ concentrations, respectively. Time-dependent measurements under 3 V bias yield a response time of 40 s and a recovery time of 47 s. These results confirm the effectiveness of the cost-efficient conventional e-beam evaporation method in producing high-performance CeO₂-based Au/CeO₂/GaN heterojunctions, highlighting their potential for integrated UV photodetection and oxygen gas sensing applications.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"714 ","pages":"Article 417514"},"PeriodicalIF":2.8,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Regulation of dielectric properties for YIG/LFO composite thin films through varying the layer thickness ratio","authors":"Nan Shen,&nbsp;Caiyin You,&nbsp;Na Tian,&nbsp;Wanyi Li,&nbsp;Xiaopei Zhu,&nbsp;Heguang Liu,&nbsp;Jing Zhang,&nbsp;Jie Cui","doi":"10.1016/j.physb.2025.417521","DOIUrl":"10.1016/j.physb.2025.417521","url":null,"abstract":"<div><div>Yttrium iron garnet (Y₃Fe₅O₁₂, YIG) ferrites are usually composited with dielectric materials to fulfill performance requirements. In this work, Y₃Fe₅O₁₂/LiFe₅O₈ (YIG/LFO) composite dielectric films were fabricated via chemical solution deposition, and the layer thickness ratio was varied to achieve differing properties. Dielectric spectrum analysis shows that a YIG/LFO thickness ratio of 3:7 provides a dielectric constant of 19.24 at 100 Hz, primarily due to the enhanced internal electric field. When the thickness ratio is 5:5, the dielectric tunability at 20 kHz reaches −55.9 %, which is 5.75 times greater than the value observed at a 7:3 ratio due to the increased oxygen vacancy concentration. However, the 7:3 composite film exhibited outstanding temperature stability within the temperature range of −120 °C–120 °C. Theoretical calculations show that oxygen vacancies significantly enhance dielectric tuning by altering the electronic structure and physical properties of these composite materials.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"714 ","pages":"Article 417521"},"PeriodicalIF":2.8,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144338546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}