Journal of Superconductivity and Novel Magnetism最新文献_第2页

Thermally Engineered NiFe2O4 Nanoparticles via Controlled Decomposition: A High-Performance Candidate for Magnetic Hyperthermia Applications-Based Cancer Therapy 通过控制分解的热工程NiFe2O4纳米颗粒：磁性热疗应用为基础的癌症治疗的高性能候选物

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-09-19 DOI: 10.1007/s10948-025-07049-9

Moatasem Oudah AL-Sawafi, Nadir M. Nanakali, Ali Abbasi, Mohammad Waleed M. Sadaka, Sattar H. Abed, Shaymaa Awad kadhim, Masoomeh Sadat Fini, Kamran Heydaryan

{"title":"Thermally Engineered NiFe2O4 Nanoparticles via Controlled Decomposition: A High-Performance Candidate for Magnetic Hyperthermia Applications-Based Cancer Therapy","authors":"Moatasem Oudah AL-Sawafi, Nadir M. Nanakali, Ali Abbasi, Mohammad Waleed M. Sadaka, Sattar H. Abed, Shaymaa Awad kadhim, Masoomeh Sadat Fini, Kamran Heydaryan","doi":"10.1007/s10948-025-07049-9","DOIUrl":"10.1007/s10948-025-07049-9","url":null,"abstract":"<div>Magnetic hyperthermia therapy represents a cutting-edge oncological treatment that harnesses the localized heating of magnetic nanoparticles (MNPs) under an alternating magnetic field (AMF). In this study, monodisperse nickel ferrite (NiFe2O4) nanoparticles were synthesized via a controlled thermal decomposition strategy to achieve optimized magnetic characteristics suitable for biomedical hyperthermia. The synthesis conditions were systematically tuned using 7.5 mmol of oleylamine and oleic acid as surfactants, yielding highly uniform nanoparticles with enhanced superparamagnetic properties. Structural and morphological characterization using X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) confirmed the formation of a pure spinel phase with narrow size distribution, while magnetic measurements via vibrating sample magnetometry (VSM) revealed a high saturation magnetization of 29.1 emu/g and low coercivity of 58.3 Oe. Notably, the obtained SLP value of 85.3 W/g under 400 Oe and 400 kHz confirms the heating capability of the nanoparticles for magnetic hyperthermia applications. These findings establish thermally tailored NiFe2O4 nanoparticles as promising candidates for advanced magnetically driven therapeutic platforms.\u0000</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145078966","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

Magnetocaloric Effect and Critical Magnetic Behavior in La0.8 Na0.2 Mn1–x GaxO3 (x = 0, 0.025) Perovskite Manganite La0.8 Na0.2 Mn1-x GaxO3 （x = 0,0.025）钙钛矿锰矿的磁热效应和临界磁行为

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-09-18 DOI: 10.1007/s10948-025-07053-z

M. R. Laouyenne, Mohamed Baazaoui, Fatma Aouaini, Beriham Basha, Kholoud Saad Al-mugren

{"title":"Magnetocaloric Effect and Critical Magnetic Behavior in La0.8 Na0.2 Mn1–x GaxO3 (x = 0, 0.025) Perovskite Manganite","authors":"M. R. Laouyenne, Mohamed Baazaoui, Fatma Aouaini, Beriham Basha, Kholoud Saad Al-mugren","doi":"10.1007/s10948-025-07053-z","DOIUrl":"10.1007/s10948-025-07053-z","url":null,"abstract":"<div>In this work, we investigated the XRD patterns, magnetic measurements, and critical phenomena of La0.8 Na0.2 Mn1–x GaxO3 (x = 0, 0.025). The samples crystallize in the rhombohedral structure with R-3C symmetry. Magnetic data show that the compounds undergo a ferromagnetic-paramagnetic phase transition around the Curie temperature (TC). We observed that TC decreases from 297 to 290 K with 0.025 of Ga doping. Additionally, the magnetic entropy change (ΔSM) reaches its highest values around TC during the order-disorder transition. At a Magnetic field of 5 T, −ΔSM is 4.5 J·kg−1·K−1 for the parent compound and 4.3 J·kg−1·K−1 the doped sample. However, the relative cooling power (RCP) increases with the Ga doping, with RCP values of 279 J·kg−1 and 299 J·kg−1 for x = 0 and 0.025 respectively. We confirmed that both materials undergo a second-order magnetic phase transition based on the universal master curve and the Banerjee criteria. From the critical behavior analysis, we found that the samples conform well to the mean-field model with (β = 0.49 and 0.48, γ = 1 and 0.95; δ equal to 2.87 and 3.10 for x = 0 and 0.025, respectively).</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073843","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

Impact of Mg2+ Ions Substitution on Structural Morphological and Electrical Impedance Study of Magnetic Ni0.6-xMgxCo0.4Fe2O4 (x = 0.1, 0.2, 0.3, 0.4, 0.5) Nanoferrites Mg2+离子取代对磁性Ni0.6-xMgxCo0.4Fe2O4 （x = 0.1, 0.2, 0.3, 0.4, 0.5）纳米铁素体结构、形态和电阻抗的影响

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-09-16 DOI: 10.1007/s10948-025-07042-2

Chandan U. Narayankar, Chnar H. Aziz, Hany Koheil, R. H. Patil, S. B. Patil, Ahmad Hosseini-Bandegharaei, Basem E. Keshta, Manikandan Ayyar, R. P. Patil, Lalitha Gnanasekaran, V. Mohanavel, M. Santhamoorthy, S. Santhoshkumar

{"title":"Impact of Mg2+ Ions Substitution on Structural Morphological and Electrical Impedance Study of Magnetic Ni0.6-xMgxCo0.4Fe2O4 (x = 0.1, 0.2, 0.3, 0.4, 0.5) Nanoferrites","authors":"Chandan U. Narayankar, Chnar H. Aziz, Hany Koheil, R. H. Patil, S. B. Patil, Ahmad Hosseini-Bandegharaei, Basem E. Keshta, Manikandan Ayyar, R. P. Patil, Lalitha Gnanasekaran, V. Mohanavel, M. Santhamoorthy, S. Santhoshkumar","doi":"10.1007/s10948-025-07042-2","DOIUrl":"10.1007/s10948-025-07042-2","url":null,"abstract":"<div>Magnesium-doped nickel–cobalt ferrite in nanoscale form can be created using a sol–gel process. The crystallite diameters, varying from 42 to 73 nm, are confirmed by XRD examination. Ferrimagnetism, a form of magnetism in which the material’s magnetic moments align to produce a net magnetic field, is shown by synthesized ferrites. As the frequency rises, the ac resistivity changes in all the samples, showing a decreasing trend, which is typical of ferrites. These variations are explained by the electronic hopping between ferrous ↔ ferric ions and the concentration of ferrous ↔ ferricions on octahedral sites. An LCR-Q meter and a frequency function were used to examine the samples’ initial permeability. The actual part of early permeability was observed to rise. By taking into account both resistance (actual component) and reactance (imaginary part), a complex impedance analysis examines the resistance to alternating current (AC) flow in a circuit or material. The electrical characteristics and conduction processes of the material are revealed by this investigation, which is frequently carried out utilising sophisticated impedance studies.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062267","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

Structural, Electrical, Magnetic, and Electrochemical Properties of Mg0.5MnxZn0.5-xFe2O4 Nanoferrites Mg0.5MnxZn0.5-xFe2O4纳米铁素体的结构、电学、磁学和电化学性能

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-09-15 DOI: 10.1007/s10948-025-07045-z

Nancy, Preeti Thakur, Ritesh Verma, Rakesh Kumar, Yassine Slamani, Atul Thakur

{"title":"Structural, Electrical, Magnetic, and Electrochemical Properties of Mg0.5MnxZn0.5-xFe2O4 Nanoferrites","authors":"Nancy, Preeti Thakur, Ritesh Verma, Rakesh Kumar, Yassine Slamani, Atul Thakur","doi":"10.1007/s10948-025-07045-z","DOIUrl":"10.1007/s10948-025-07045-z","url":null,"abstract":"<div>Herein, manganese-doped magnesium zinc ferrite nanoparticles were synthesized using co-precipitation method. X-ray diffraction (XRD) analysis of the ferrite samples showed a pure spinel phase (Mg0.5MnxZn0.5-xFe2O4) with a cubic spinel structure where crystallite size was observed in the range of 13 to 18 nm, whereas the lattice parameter increased from 7.678 to 7.726 Å with an increase in Mn2+ ion concentration. The increase in crystallite size was coupled with a reduction in the lattice strain, which ranged from 0.020 to 0.007. FTIR studies showed that when Mn2+ ion doping increased, the band location in the high-frequency band region decreased from 565.182 to 418.779 cm−1. Five Raman active vibrational modes at 180–700 cm−1 were visible in the Raman spectra. With low coercivity, the nanoferrites displayed excellent magnetization values from 24.44 to 42.11 emu/g. A single semicircular arc in the Cole–Cole plot described grain dominance. According to the impedance spectrometry plot, composition x = 0.4 exhibited the highest ac conductivity, 0.000137 S/cm, at 10 MHz frequency, and the lowest tangent loss value, 0.553, at 1.12 MHz frequency for x = 0.0 composition. As the doping level increased, the ac conductivity increased as well. None of the samples exhibit Debye behavior, as indicated by the wide range of conductivity values. The substitution of manganese ions not only affected the structural characteristics of the nanoferrites but also significantly impacted their electrical conductivity from 0.34 × 10−4 to 1.3 × 10−4 S/cm. These changes made Mn-substituted Mg–Zn nanoferrites promising candidates for various applications in magnetic devices and energy storage systems.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145057672","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

Phase-Dependent Topological and Superconductivity Properties of Tantalum-Carbide Systems 碳化钽体系的相依赖拓扑和超导性

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-09-12 DOI: 10.1007/s10948-025-07046-y

Hichem Benaissa, Saleha Azzi, Abdelkader Menad, Mohamed Ferhat

{"title":"Phase-Dependent Topological and Superconductivity Properties of Tantalum-Carbide Systems","authors":"Hichem Benaissa, Saleha Azzi, Abdelkader Menad, Mohamed Ferhat","doi":"10.1007/s10948-025-07046-y","DOIUrl":"10.1007/s10948-025-07046-y","url":null,"abstract":"<div>The pursuit of viable superconducting and topological materials stands at the forefront of condensed matter physics, as these systems harbor a multitude of exotic quantum phenomena rooted in their distinctive electronic structures. In this study, we employ advanced first-principles density functional theory to systematically probe the topological and superconducting properties of hexagonal TaC and trigonal Ta2C. Our electronic structure calculations reveal that hexagonal TaC is a Wely semimetal witch hosts Weyl nodes and a nodal ring without spin–orbit coupling (SOC). Moreover, relativistic trigonal Ta₂C demonstrates a robust nontrivial topological phase characterized by a nonzero Z₂(1; 000) invariant. Phonon dispersion analyses confirm the dynamical stability of both phases, with superconducting critical temperatures Tc of 17.33 K for hexagonal TaC and 1.37 K for trigonal Ta₂C. The enhanced superconductivity in hexagonal TaC stems from the strong Bardeen-Cooper-Schrieffer electron pairing mediated by Ta-d electrons and significant contributions from both Ta-acoustic and C-optic phonon modes. In contrast, the markedly lower Tc of trigonal Ta2C, approximately an order of magnitude less than its hexagonal counterpart and slightly below the experimental measurement of 4.1 K, is attributable to weaker electron–phonon coupling and a diminished density of states at the Fermi level.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145037221","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 Pressure Effects on the Topological, Thermoelectric, and Superconducting Properties of HoAs and HoSb 压力对HoAs和HoSb拓扑、热电和超导性质影响的第一性原理研究

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-09-08 DOI: 10.1007/s10948-025-07041-3

Mahdi Abane, Mokhtar Elchikh, Soumia Bahlouli, Said Hiadsi

{"title":"First-Principles Investigation of Pressure Effects on the Topological, Thermoelectric, and Superconducting Properties of HoAs and HoSb","authors":"Mahdi Abane, Mokhtar Elchikh, Soumia Bahlouli, Said Hiadsi","doi":"10.1007/s10948-025-07041-3","DOIUrl":"10.1007/s10948-025-07041-3","url":null,"abstract":"<div>In this study, we conducted a comprehensive investigation of the structural, elastic, thermodynamic, electronic behavior, magnetism, thermoelectric performance, and superconducting properties of HoAs and HoSb alloys using density functional theory (DFT) within the full-potential linearized augmented plane wave (FP-LAPW) method in the WIEN2k code. Due to the presence of heavy elements, spin–orbit coupling (SOC) effects were explicitly incorporated into all computations. Our findings reveal that the antiferromagnetic type-III phase is the most stable magnetic configuration for both compounds. Through full analysis, we demonstrate that HoAs and HoSb exhibit promising properties suitable for various technological applications. Moreover, we highlight a significant influence of hydrostatic pressure on the topological properties, which induces a phase transition from trivial to nontrivial semimetal for both compounds. Pressure also enhances their superconducting properties, increasing the critical temperature Tc from 1.5 K to 2.62 K and from 1.23 K to 2.53 K for HoAs and HoSb, respectively.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145007848","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

Strange Changes in Weight of YBCO Occurring During its Hydration and Under the Influence of Alternating Magnetic Field 交变磁场作用下YBCO水化过程中重量的奇异变化

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-09-08 DOI: 10.1007/s10948-025-07043-1

A. V. Fetisov

引用次数: 0

Investigation of Structural, Electronic, Elastic and Thermodynamic Properties of AV2O4 (A = Cd, Mg, Zn) Spinel Compounds AV2O4 （A = Cd, Mg, Zn）尖晶石化合物的结构、电子、弹性和热力学性质研究

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-09-08 DOI: 10.1007/s10948-025-07044-0

M. A. Ghebouli, K. Bouferrache, B. Ghebouli, M. Fatmi, S. Alomairy, Faisal K. Alanazi

{"title":"Investigation of Structural, Electronic, Elastic and Thermodynamic Properties of AV2O4 (A = Cd, Mg, Zn) Spinel Compounds","authors":"M. A. Ghebouli, K. Bouferrache, B. Ghebouli, M. Fatmi, S. Alomairy, Faisal K. Alanazi","doi":"10.1007/s10948-025-07044-0","DOIUrl":"10.1007/s10948-025-07044-0","url":null,"abstract":"<div>A comprehensive first-principles study of the structural, electronic, elastic, and thermodynamic properties of CdV₂O₄, MgV₂O₄, and ZnV₂O₄ spinel compounds has been performed using density functional theory (DFT) within the local density approximation (LDA). The calculations were carried out using the CASTEP Package. Our results show that all three compounds exhibit semiconducting behavior with complex electronic structures dominated by V 3d and O 2p states. The calculated lattice parameters demonstrate excellent agreement with experimental data, with deviations less than 3%. The bulk moduli follow the order ZnV₂O₄ (208.2 GPa) > MgV₂O₄ (174.2 GPa) > CdV₂O₄ (165.2 GPa), correlating inversely with the ionic radii of the A-site cations. Elastic properties analysis confirms mechanical stability for all compounds, with MgV₂O₄ showing the highest elastic anisotropy (A = 1.383). The pressure–volume relationships follow the Birch-Murnaghan equation of state, enabling accurate prediction of high-pressure behavior. Thermodynamic calculations reveal that heat capacities approach the classical Dulong-Petit limit at elevated temperatures, with Debye temperatures of 576.61 K, 615.04 K, and 716.91 K for CdV₂O₄, MgV₂O₄, and ZnV₂O₄, respectively. These findings provide fundamental insights into the structure–property relationships of vanadium-based spinel compounds for potential applications in electronic devices, high-pressure technologies, and thermal management systems.\u0000</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145007847","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

Magnetic Properties of Square–Hexagon-Octagon Bilayer Structure with RKKY Interactions: Monte Carlo Simulations 具有RKKY相互作用的方形-六边形-八边形双层结构的磁性：蒙特卡罗模拟

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-09-06 DOI: 10.1007/s10948-025-07040-4

I. Elhnaki, R. Masrour, T. Sahdane

引用次数: 0

DFT-Based Investigation of EuCo2Bi2 for Thermoelectric and Optoelectronic Applications 基于dft的EuCo2Bi2热电光电应用研究

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-09-03 DOI: 10.1007/s10948-025-07039-x

A. Jabar, N. Maaouni, S. Benyoussef, L. Bahmad

{"title":"DFT-Based Investigation of EuCo2Bi2 for Thermoelectric and Optoelectronic Applications","authors":"A. Jabar, N. Maaouni, S. Benyoussef, L. Bahmad","doi":"10.1007/s10948-025-07039-x","DOIUrl":"10.1007/s10948-025-07039-x","url":null,"abstract":"<div>In this study, we investigate the structural, electronic, elastic, optical, thermoelectric, and thermodynamic properties of the EuCo2Bi2 compound using density functional theory (DFT) within the Wien2K software package. The generalized gradient approximation (GGA) is applied for exchange–correlation effects, while the Gibbs code is utilized for an in-depth thermodynamic analysis. Our results indicate that EuCo2Bi2 exhibits metallic behavior, as evidenced by electronic bands crossing the Fermi level. The elastic property evaluation confirms its ductile nature, highlighting mechanical stability. Thermodynamic analysis reveals a sharp increase in heat capacity at constant volume up to 400 K, followed by saturation near 120 J·K−1·mol−1. Optical investigations demonstrate strong absorption in the ultraviolet region, with a peak absorption coefficient at approximately 6.8 eV. Furthermore, thermoelectric analysis identifies EuCo2Bi2 as an n-type material with a high Seebeck coefficient and low electronic thermal conductivity. These findings suggest that EuCo2Bi2 holds promising potential for applications in thermoelectric devices, optoelectronics, and energy storage technologies.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144934511","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