Journal of Superconductivity and Novel Magnetism最新文献_第7页

Structural, Magnetic and Terahertz Optical and Dielectric Properties of Zn0.1Co0.9Fe2O4 Zn0.1Co0.9Fe2O4的结构、磁性、太赫兹光学和介电性质

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2026-05-27 DOI: 10.1007/s10948-026-07194-9

Ganesh Pawar, Amitkumar Pandey, Sarang Joshi, J.P. Parvathy, N. S. Warade, P. B. Mane, Sher Singh Meena, Sudeep Tiwari, S. S. Prabhu

{"title":"Structural, Magnetic and Terahertz Optical and Dielectric Properties of Zn0.1Co0.9Fe2O4","authors":"Ganesh Pawar, Amitkumar Pandey, Sarang Joshi, J.P. Parvathy, N. S. Warade, P. B. Mane, Sher Singh Meena, Sudeep Tiwari, S. S. Prabhu","doi":"10.1007/s10948-026-07194-9","DOIUrl":"10.1007/s10948-026-07194-9","url":null,"abstract":"<div>Sol-gel synthesized Zn0.1Co0.9Fe2O4 was characterized extensively for its structural, magnetic, and optical and dielectric properties in terahertz frequencies. X-ray diffractometry confirmed the pure cubic spinel phase (space group: Fd-3 m). Rietveld analysis in consonance with the room temperature 57Fe- Mössbauer data confirmed the inverse spinel structure. Field and temperature dependent magnetization revealed typical ferrimagnetic behaviour with a decent saturation magnetization of 88 emu/g. Terahertz time-domain spectrum in frequency range of 0.3–2.0 THz demonstrated a nearly constant refractive index ~ 2.95 and a low extinction coefficient, indicative of weak absorption and minimal dielectric loss. The real part of the complex dielectric permittivity exhibited remarkable stability (~ 8.94), while the imaginary part displayed negligible dispersion across the measured frequency range. These results demonstrate that low-level Zn substitution effectively tailors the electromagnetic response of cobalt ferrite, positioning Zn0.1Co0.9Fe2O4 as a promising candidate for high-frequency applications.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 3","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148172928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Lead-Free Halide Perovskites KSiI3 and RbSiI3: First-Principles Insights into Structural Stability, Optoelectronic Properties, and Photocatalytic Water-Splitting Potential 无铅卤化物钙钛矿KSiI3和RbSiI3：结构稳定性、光电性能和光催化水分解电位的第一性原理见解

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2026-05-26 DOI: 10.1007/s10948-026-07187-8

A. Et-Taleb, A. Samih, Salma Naimi, I. Merzouk, E. Salmani, Z. Fadil, Musarat Amina, Mohammad Ajmal Ali, Chaitany Jayprakash Raorane

{"title":"Lead-Free Halide Perovskites KSiI3 and RbSiI3: First-Principles Insights into Structural Stability, Optoelectronic Properties, and Photocatalytic Water-Splitting Potential","authors":"A. Et-Taleb, A. Samih, Salma Naimi, I. Merzouk, E. Salmani, Z. Fadil, Musarat Amina, Mohammad Ajmal Ali, Chaitany Jayprakash Raorane","doi":"10.1007/s10948-026-07187-8","DOIUrl":"10.1007/s10948-026-07187-8","url":null,"abstract":"<div>Lead-based halide perovskites, despite their remarkable optoelectronic properties, suffer from significant drawbacks, including toxicity and environmental instability, which hinder large-scale deployment in clean energy technologies. To address these concerns, lead-free halide perovskites have emerged as sustainable alternatives, offering comparable performance with reduced ecological and health risks. In this work, we present a comprehensive investigation into the structural, electronic, elastic, optical, and photocatalytic properties of the lead-free halide perovskites KSiI3 and RbSiI3. The formability and mechanical stability of both compounds were confirmed via tolerance factor and elastic constants, while the AIMD simulations confirms the thermal stability of both materials at 300 K. HSE functional was used to accurately capture their electronic and optical characteristics. It is found that KSiI3 and RbSiI3 are direct band-gap semiconductors (1.44 eV, 1.47 eV), highlighting their potential for photovoltaic applications. Furthermore, the photocatalytic behavior was examined, highlighting the influence of pH on the valence and conduction band edges, confirming that both materials meet the energetic requirements for water-splitting reactions, thereby demonstrating their suitability for photocatalytic hydrogen production.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 3","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148010029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Re-examining Magnetic Flux Density at the Nanoscale: A Statistical Perspective on Continuum and Discrete Regimes 在纳米尺度上重新检查磁通密度：连续和离散状态的统计观点

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2026-05-23 DOI: 10.1007/s10948-026-07188-7

Donglu Shi, David A. Cardwell

{"title":"Re-examining Magnetic Flux Density at the Nanoscale: A Statistical Perspective on Continuum and Discrete Regimes","authors":"Donglu Shi, David A. Cardwell","doi":"10.1007/s10948-026-07188-7","DOIUrl":"10.1007/s10948-026-07188-7","url":null,"abstract":"<div>Magnetic flux density (B) is traditionally interpreted as a continuous field whose flux lines form closed loops, as prescribed by Maxwell’s equations. This description is well justified in macroscopic systems, where large ensembles of magnetic dipoles produce statistically smooth fields through spatial averaging. At the nanoscale, however, where only a limited number of dipoles may contribute, the conditions underlying this continuum interpretation become less clear. Here, we reexamine the meaning of magnetic flux density from a classical-statistical perspective, focusing on finite ensembles and isolated magnetic particles. We show that as the number of contributing dipoles decreases, ensemble averaging becomes insufficient to support a statistically stable, coarse-grained field description, even though the underlying electromagnetic fields remain well defined and fully consistent with Maxwell’s equations. In this regime, magnetic flux density retains its formal definition, but its interpretation as a robust macroscopic observable becomes strongly dependent on fluctuations and specific dipole configurations. This framework introduces a quantitative criterion based on a critical particle number and provides a consistent description of the transition from ensemble-averaged magnetostatics to discrete dipole behavior. The results clarify the limits of continuum field interpretations at the nanoscale and offer a unified perspective for understanding isolated nanoparticles, small dipole ensembles, and the emergence of classical magnetic behavior from discrete microscopic sources.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 3","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10948-026-07188-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148009669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Large-Scale Synthesis and Origin of the Thermally Enhanced Saturation Magnetization of Antiperovskite Manganese Carbide Mn4C 反钙钛矿型碳化锰Mn4C热增强饱和磁化的大规模合成及其来源

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2026-05-23 DOI: 10.1007/s10948-026-07196-7

Tingting Qi, Qiang Zhang, Yinghua Liang, Ping-Zhan Si, Jihoon Park, Zhong Zhang, Chul-Jin Choi, Qiong Wu

{"title":"Large-Scale Synthesis and Origin of the Thermally Enhanced Saturation Magnetization of Antiperovskite Manganese Carbide Mn4C","authors":"Tingting Qi, Qiang Zhang, Yinghua Liang, Ping-Zhan Si, Jihoon Park, Zhong Zhang, Chul-Jin Choi, Qiong Wu","doi":"10.1007/s10948-026-07196-7","DOIUrl":"10.1007/s10948-026-07196-7","url":null,"abstract":"<div>Magnetic materials with thermally enhanced saturation magnetization (MS) are very rare but critically important, as they help resist the thermal degradation of magnetic properties caused by the disruption of magnetic ordering at elevated temperatures. This paper summarizes magnetic materials that exhibit anomalous thermal enhancement of saturation magnetization. Particularly, a solid-state reaction method was developed for large scale synthesis of antiperovskite Mn4+xC, which is the latest system that exhibits thermal-enhanced magnetization. The neutron diffraction results indicate a ferrimagnetic structure of Mn4C, in which the face-centered Mn moments (~ 1.122(12)µB) vary little with temperature while the cornered Mn moment decreases from 3.227(15)µB at 10 K to 3.187(14)µB at 300 K, resulting in the increasing saturation magnetization with increasing temperature. A total energy calculation on the Mn4C unit cell suggests an easy axis of [111]. Our theoretical and neutron results agree satisfactorily with the measured magnetization of Mn4C samples. This work provides a more effective synthesis method of Mn4C, a better understanding to the origin of positive temperature coefficient of magnetization in Mn4C, and a method to control the dMS/dT of Mn4+xC.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 3","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148009665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

First Principles Investigation of PtTaAl Half-Heusler: Structural, Electronic, Optical, and Thermoelectric Properties for High-Performance Medium-to-High-Temperature Clean Energy and Waste-Heat Recovery Applications PtTaAl半heusler的第一性原理研究：高性能中高温清洁能源和废热回收应用的结构、电子、光学和热电性质

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2026-05-19 DOI: 10.1007/s10948-026-07189-6

Nelson O. Nenuwe, Oghogho W. Omagbemi

{"title":"First Principles Investigation of PtTaAl Half-Heusler: Structural, Electronic, Optical, and Thermoelectric Properties for High-Performance Medium-to-High-Temperature Clean Energy and Waste-Heat Recovery Applications","authors":"Nelson O. Nenuwe, Oghogho W. Omagbemi","doi":"10.1007/s10948-026-07189-6","DOIUrl":"10.1007/s10948-026-07189-6","url":null,"abstract":"<div>This study presents a comprehensive computational investigation of the structural, electronic, optical, and thermoelectric properties of PtTaAl half-Heusler compound for potential clean energy applications. Using density functional theory (DFT) within the WIEN2k computational framework, supported by the PBE-GGA and mBJ exchange–correlation approximations, the structural stability of PtTaAl was examined across α, β, and γ atomic configurations. Volume optimization and formation-energy analysis reveal that the γ-phase is the most thermodynamically stable configuration, exhibiting negative formation energy that confirms the feasibility of experimental synthesis. Electronic band structure calculations show that PtTaAl behaves like a direct-band-gap semiconductor with a band gap of 0.60 eV (PBE-GGA) and 0.71 eV (mBJ). Density of states analysis further indicates that the d-states of Pt atoms dominate contributions near the Fermi level. Thermoelectric properties, computed using BoltzTraP based on semiclassical Boltzmann transport theory, demonstrate that PtTaAl exhibits promising thermoelectric behavior. The results highlight the material’s strong suitability for medium-to-high-temperature waste-heat recovery and renewable energy conversion. Optical analysis further confirms the potential of PtTaAl for optoelectronic applications. Overall, this research provides a detailed computational report on PtTaAl, establishing it as a viable and efficient candidate for thermoelectric and clean-energy technologies. The findings also create a solid foundation for future experimental validation and materials design involving half-Heuslers.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 3","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148008872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Comparative Structural Evolution and Size-dependent Magnetism of R2O3 (R = Yb, Er, Dy) From the Nano-to-bulk-like Regime R2O3 （R = Yb, Er, Dy）从纳米到块状的结构演化与磁性的比较

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2026-05-19 DOI: 10.1007/s10948-026-07190-z

M. G. F. Santos, D. O. Costa, L. A. Fernandes, B. J. Santos, J. G. S. Duque, C. T. Meneses, E. M. Bittar

{"title":"Comparative Structural Evolution and Size-dependent Magnetism of R2O3 (R = Yb, Er, Dy) From the Nano-to-bulk-like Regime","authors":"M. G. F. Santos, D. O. Costa, L. A. Fernandes, B. J. Santos, J. G. S. Duque, C. T. Meneses, E. M. Bittar","doi":"10.1007/s10948-026-07190-z","DOIUrl":"10.1007/s10948-026-07190-z","url":null,"abstract":"<div>We report a systematic study of the structural and magnetic properties of rare-earth sesquioxides Yb2O3, Er2O3, and Dy2O3 across a broad range of particle sizes obtained via co-precipitation and subsequent thermal annealing (500–900 °C). X-ray diffraction analysis reveals progressive grain growth with increasing temperature, with Dy2O3 exhibiting notably faster coarsening than Yb2O3 and Er2O3. Temperature-dependent susceptibility measurements indicate Curie-type paramagnetism for all compounds, while low-temperature anomalies suggest contributions from finite-size effects, crystal-field splitting, or residual defects. Field-dependent magnetization at 5 K demonstrates a clear size dependence for Yb2O3 and Er2O3, where the apparent saturation increases with particle size due to the reduction of surface disorder and the recovery of the full rare-earth moment. In contrast, Dy2O3 shows nearly size-independent magnetization, which can be associated with its larger intrinsic moment and strong single-ion anisotropy, and rapid attainment of bulk-like grain sizes. These results highlight the interplay between particle size, surface effects, and crystal-field stabilization in determining the magnetic response of rare-earth oxides and provide guidelines for tailoring nanoscale magnetism in functional materials.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 3","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10948-026-07190-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148008873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Cobalt Addition on Magnetism, Spin Polarization and Optical Properties of Fe2-xCoxMnAl Heusler Alloy for Spintronics and Photovoltaic Device Applications 钴对fe2 - xcomnal Heusler合金磁性、自旋极化和光学性能的影响

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2026-05-14 DOI: 10.1007/s10948-026-07180-1

Ashok Yadav, Vivek Kumar Jain

{"title":"Effect of Cobalt Addition on Magnetism, Spin Polarization and Optical Properties of Fe2-xCoxMnAl Heusler Alloy for Spintronics and Photovoltaic Device Applications","authors":"Ashok Yadav, Vivek Kumar Jain","doi":"10.1007/s10948-026-07180-1","DOIUrl":"10.1007/s10948-026-07180-1","url":null,"abstract":"<div>In this study of Fe2-xCoxMnAl Heusler alloys, we analysed several key properties such as electronic, magnetic and optical properties including the formation energy, electronic energy band gap, magnetic moment and spin polarization (SP). These properties were studied to understand the half-metallic stability as the lattice parameter changed. The alloys consistently maintained the total magnetic moments (MTotal) predicted by the Slater-Pauling rule (SPR), with values of 2.0 μB for x = 0.0, 2.5 μB for x = 0.5, 3.0 μB for x = 1.0, 3.5 μB for x = 1.5, and 4.0 μB for x = 2.0, across a wide range of lattice variations. Value of SP was observed 100% with half-metallic ferromagnetic (HMF) behaviour within specific lattice ranges for x = 0.5, this behaviour was observed between 5.40–5.70 Å; for x = 1.0, it was seen between 5.35–5.55 Å; for x = 1.5, the range was 5.30–5.60 Å; for x = 2.0, it occurred between 5.25–5.55 Å. Their ability to maintain a stable half-metallic character over a broad spectrum of lattice parameters also makes them strong candidates for applications in spintronics based devices. Optical characteristics of the Fe2-xCoxMnAl (x = 0 to 2) alloys are investigated in terms of optical Reflectivity R(ω), optical conductivity σ(ω), Energy loss L(ω), Absorption coefficient I(ω), real and imaginary parts of the dielectric function (i.e. ε1(ω) and ε2(ω) respectively), refractive index n(ω) and extinction coefficient K(ω) provided these materials for applicable in making solar cells and optical switches in photovoltaic device applications.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 3","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147938590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

High-Energy Ultrasonication of Y2BaCuO5 in Aqueous Medium: A Cleaner Approach to Enhanced YBa2Cu3O7-δ Bulk Superconducting Properties 水介质中Y2BaCuO5的高能超声：提高YBa2Cu3O7-δ体超导性能的更清洁方法

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2026-05-12 DOI: 10.1007/s10948-026-07185-w

Vallabhapurapu Sreenivasu, Lemma Kurie Baruda, Rikako Hagiwara, Ramesh Ade, P. M. Swarup Raju, Taichiro Nishio, Pavan Kumar Naik Sugali

{"title":"High-Energy Ultrasonication of Y2BaCuO5 in Aqueous Medium: A Cleaner Approach to Enhanced YBa2Cu3O7-δ Bulk Superconducting Properties","authors":"Vallabhapurapu Sreenivasu, Lemma Kurie Baruda, Rikako Hagiwara, Ramesh Ade, P. M. Swarup Raju, Taichiro Nishio, Pavan Kumar Naik Sugali","doi":"10.1007/s10948-026-07185-w","DOIUrl":"10.1007/s10948-026-07185-w","url":null,"abstract":"<div>YBa₂Cu₃O₇₋δ (YBCO) high-temperature superconductors exhibit enhanced flux pinning capabilities along with high critical temperature (Tc). An improvement in flux pinning and, consequently, the critical current density (Jc) can be achieved by tailoring the precursor phases and their microstructures. In this study, we compare the microstructural modifications of Y₂BaCuO₅ (Y-211) secondary phase particles via ultrasonication processing in de-ionized water (DIW) and ethanol on the superconducting properties of bulk YBCO superconductors.Y-211 precursor powders are engineered by subjecting to high-energy ultrasonication at 450 W for 30 min in de-ionized water and Ethanol. This ultrasonication treatment leads to the formation of nanoscale, surface-modified Y-211 particles, characterized by high surface reactivity and defect density. These pre-treated Y-211 powders are utilized to grow YBCO single grains employing top-seeded infiltration growth (IG) process. Electron microscopy analysis on YBCO bulks revealed a homogeneous microstructure with well-dispersed Y-211 inclusions and embedded sub-phases within the YBCO matrix. Superconducting transition measurements show sharp onset at the temperature of ~ 92 K. The self-field Jc at 77 K enhances to 90 kA/cm² using ultrasonically DIW treated Y-211 powders compared to Ethanol treated (72 kA/cm²) YBCO superconductors. These findings validate the effectiveness of ultrasonically engineered RE₂BaCuO₅ precursors in tailoring flux pinning characteristics and enhancing the performance of REBa₂Cu₃O₇₋δ bulk superconductors.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 3","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147938315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Rapid Synthesis of Bi(Pb)-2212 Superconductor by Light Irradiation 光辐照快速合成Bi(Pb)-2212超导体

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2026-05-11 DOI: 10.1007/s10948-026-07186-9

A. Kurtanidze, T. Tchabukiani, A. Gelashvili, D. Daraselia, D. Japaridze, Z. Jibuti, A. Shengelaya

{"title":"Rapid Synthesis of Bi(Pb)-2212 Superconductor by Light Irradiation","authors":"A. Kurtanidze, T. Tchabukiani, A. Gelashvili, D. Daraselia, D. Japaridze, Z. Jibuti, A. Shengelaya","doi":"10.1007/s10948-026-07186-9","DOIUrl":"10.1007/s10948-026-07186-9","url":null,"abstract":"<div>Conventional solid-state synthesis of complex oxides is typically energy-intensive and time-consuming, often requiring several days of heating in a furnace. In this work, we demonstrate the rapid synthesis of the high-temperature superconductor Bi1.6Pb0.4Sr2CaCu2O8 (Bi(Pb)-2212) using a novel photostimulated solid-state reaction (PSSR) technique. By irradiating precursor pellets with high-intensity light from a specialized halogen lamp setup, we successfully produced good quality superconducting Bi(Pb)-2212 in a total reaction time of just 100 min at 800 °C. This represents more than an order-of-magnitude acceleration compared to conventional furnace-based synthesis. Magnetization measurements reveal a clear superconducting transition at Tc ≈ 80 K, along with a substantial superconducting volume fraction, confirming the formation of bulk superconductivity. In contrast, samples prepared in a furnace under identical short-duration conditions predominantly form the Bi-2201 phase and exhibit a negligible superconducting fraction. The significant acceleration of the solid-state reaction under light irradiation is attributed to non-thermal processes induced by high-energy photons, which are hypothesized to weaken chemical bonds and enhance atomic diffusion. These results establish PSSR as a rapid and energy-efficient method for the synthesis of complex functional oxides.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 3","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147937762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Optimizing Bi2223 Superconductors with 2D Materials: rGO as the Superior Dopant 用二维材料优化Bi2223超导体：氧化石墨烯作为优越掺杂剂

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2026-05-11 DOI: 10.1007/s10948-026-07184-x

Hossein Koohani, Mardali Yousefpour, Nastaran Riahi Nouri

{"title":"Optimizing Bi2223 Superconductors with 2D Materials: rGO as the Superior Dopant","authors":"Hossein Koohani, Mardali Yousefpour, Nastaran Riahi Nouri","doi":"10.1007/s10948-026-07184-x","DOIUrl":"10.1007/s10948-026-07184-x","url":null,"abstract":"<div>This work presents a comparative study on the influence of low-concentration (1 wt%) two-dimensional (2D) additives—namely graphite, graphene, graphene oxide (GO), reduced graphene oxide (rGO), and hexagonal boron nitride (h-BN)—on the phase formation, microstructure, and superconducting properties of the high-temperature superconductor Bi₂Sr₂Ca₂Cu₃O₁₀₊δ (Bi2223). Samples were synthesized via solid-state reaction and characterized using X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM/TEM), and four-probe resistivity measurements. Among all dopants, rGO emerged as the most effective enhancer, delivering the highest Bi2223 phase fraction (76.2%), critical temperature (Tc = 112 K), critical current density (Jc = 8.8 × 10² A/cm²), and crystallite size (149.3 nm). Its superior performance is ascribed to its ultrathin, defect-rich, and highly exfoliated nanostructure, which promotes heterogeneous nucleation, facilitates ion diffusion, enhances grain alignment, and strengthens intergranular connectivity—thereby suppressing weak-link behavior and improving flux pinning. In contrast, graphite suffers from severe agglomeration and poor dispersion, yielding the weakest performance, while GO, graphene, and h-BN show intermediate improvements. These results establish rGO as a highly promising additive for engineering high-performance Bi2223-based superconductors for practical applications in power transmission, magnets, and advanced electronics.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 3","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147937763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0