Journal of Superconductivity and Novel Magnetism最新文献

{"title":"First-Principles Investigation of Stability and Superconductivity in Magnesium Hexahydride Under High Pressures","authors":"Ahmed Draoui,&nbsp;Saad Boudabia","doi":"10.1007/s10948-025-07031-5","DOIUrl":"10.1007/s10948-025-07031-5","url":null,"abstract":"<div><p>This study explores the structural, mechanical, vibrational, and superconducting properties of magnesium hexahydride (MgH₆) under high pressure using first-principles density functional theory (DFT) with the generalized gradient approximation (GGA-PBE). Phonon dispersion calculations, performed via density functional perturbation theory (DFPT), reveal that MgH₆ achieves dynamic stability above 295 GPa, as evidenced by the absence of imaginary frequencies in the vibrational spectrum. While imaginary modes persist at lower pressures (150–290 GPa), their localized nature ensures minimal impact on the overall electron–phonon coupling strength. The calculated elastic constants satisfy the Born-Huang criteria, confirming mechanical stability across the 150–400 GPa range. By solving the Migdal-Eliashberg equations with a Coulomb pseudopotential (<i>μ</i>^<i>*</i> = 0.136), we predict a maximum superconducting critical temperature (<span>({T}_{C})</span>) of 238 K at 290 GPa. This peak <span>({T}_{C})</span> correlates with enhanced coupling from phonon softening near the stability threshold, underscoring the interplay between dynamic stability and superconductivity. Our results highlight MgH₆ as a promising high-temperature superconductor and provide insights into the stabilization mechanisms of hydrogen-rich compounds under extreme conditions.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868700","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}

{"title":"The Eliashberg Function of Strong Coupling Superconductivity and Lifetime Broadening in Graphene","authors":"Khim S. Hernane,&nbsp;Danilo M. Yanga","doi":"10.1007/s10948-025-06996-7","DOIUrl":"10.1007/s10948-025-06996-7","url":null,"abstract":"<div><p>This paper theoretically investigates the lifetime broadening in graphene using the Eliashberg function of strong coupling superconductivity theory. The normal state lifetime broadening is calculated using the low-temperature limit, while the superconducting-state lifetime broadening is obtained using both low-temperature and low-frequency approximations. In both cases, the Eliashberg function is employed, considering only phonon emissions and electron-phonon interactions on the Fermi surface, with the quasi-elastic approximation term absent in the resulting expression. Notably, the results suggest that this lifetime broadening is highly dependent on the perturbation potential caused by electron-phonon interactions, highlighting the critical role of these interactions in shaping the material’s electronic characteristics. Furthermore, the scattering process dominates the lifetime broadening contribution in the superconducting state, particularly under conditions where phonon-mediated interactions are enhanced. This finding provides valuable insights into the intricate behavior of graphene in superconducting regimes, offering a theoretical framework that advances our understanding of its properties and potential applications.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140120","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}

{"title":"Spin-Glass Transition in Mn(_{0.75})Co(_{2.25})BO(_{5}) Compound","authors":"D. V. Popov,&nbsp;V. A. Shustov,&nbsp;R. G. Batulin,&nbsp;M. A. Cherosov,&nbsp;E. M. Moshkina,&nbsp;R. M. Eremina","doi":"10.1007/s10948-025-06999-4","DOIUrl":"10.1007/s10948-025-06999-4","url":null,"abstract":"<div><p>Block-shaped crystals of Mn<span>(_{0.75})</span>Co<span>(_{2.25})</span>BO<span>(_{5})</span>, composed of aggregates of small single crystallites, were grown via the flux method using a Bi<span>(_{2})</span>Mo<span>(_{3})</span>O<span>(_{12})</span>-based flux modified with Na<span>(_{2})</span>CO<span>(_{3})</span>. The crystals were powdered prior to analysis. X-ray powder diffraction revealed a <i>Pbam</i> space group with lattice parameters <span>(a = 9.2637(6))</span> Å, <span>(b = 12.3030(5))</span> Å, and <span>(c = 3.0344(1),text{AA })</span>. X-ray diffraction and temperature-dependent measurements of AC and DC magnetization were performed on the Mn<span>(_{0.75})</span>Co<span>(_{2.25})</span>BO<span>(_{5})</span> powder. Measurements of AC and DC magnetization demonstrate a spin-glass transition near 42.5 K.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135505","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}

{"title":"Magnetic Phase Transitions and Hysteresis in Hexagonal Multi-layered Core/Double-Shell Nanowires","authors":"M. Chakir,&nbsp;A. El Ghazrani,&nbsp;L. B. Drissi","doi":"10.1007/s10948-025-06991-y","DOIUrl":"10.1007/s10948-025-06991-y","url":null,"abstract":"<div><p>We investigated the magnetic properties and phase transitions of a hexagonal Ising multi-layered core/double-shell nanowire comprising a spin-5/2 core, a spin-1 inner shell, and a spin-3/2 outer shell. Using Monte Carlo simulations based on the Metropolis algorithm and exact calculations of ground-state phase diagrams, we explored the system’s behavior under various Hamiltonian parameters. The zero-temperature ground-state diagrams (GSDs) revealed multiple stable configurations with diverse topologies, including a compensation phenomenon for negative crystalline fields (<span>(Delta )</span>). The phase diagram in the (T, <span>(Delta )</span>) plane was mapped, identifying ferromagnetic, semi-ordered, and paramagnetic phases. The temperature dependence of total and partial magnetization was analyzed for different values of <span>(Delta )</span>, external field (h), and interface exchange couplings (J<span>( _{int})</span>). Additionally, hysteresis loops were studied under varying nanowire length (L), temperature (T), and J<span>(_{int})</span>, revealing a strong correlation between these parameters and the loops’ shape. This study provides significant insights for the design and optimization of next-generation nanomagnetic systems, with potential applications including, advanced memory storage devices and spintronic components.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144108381","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}

{"title":"Magnetic Ordered State and Enhanced Conductivity in La3-xTbxNi2O7−δ with High Oxygen Pressure Annealing","authors":"Keke Jiao,&nbsp;Rui Niu,&nbsp;Weili Zhen,&nbsp;Huixin Xu,&nbsp;Wanli Zhu,&nbsp;Li Zheng,&nbsp;Yongliang Qin,&nbsp;Changjin Zhang","doi":"10.1007/s10948-025-06989-6","DOIUrl":"10.1007/s10948-025-06989-6","url":null,"abstract":"<div><p>A series of La_3-<i>x</i>Tb_<i>x</i>Ni₂O_7-δ samples have been synthesized for the first time, and the effects of Tb doping in La₃Ni₂O_7-δ are investigated through a comprehensive investigation on the structural parameters, electrical transport, and magnetic properties of the La_3-<i>x</i>Tb_<i>x</i>Ni₂O_7-δ samples. Novel magnetic ordered state has been observed both in the as-prepared La_3-<i>x</i>Tb_<i>x</i>Ni₂O_7-δ compounds and in the samples after high oxygen pressure annealing. The high oxygen pressure annealing results in substantial enhancement of the oxygen content and the increase of nominal valence state of Ni in the La_3-<i>x</i>Tb_<i>x</i>Ni₂O_7-δ samples, leading to an enhanced conductivity. The present work could contribute to the exploration of possible ambient pressure superconductivity in doped La₃Ni₂O_7-δ systems.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10948-025-06989-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144117576","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}

{"title":"Influence of Calcination Temperature on Magnetic Properties and Antibacterial Activities of Co–Ni-Cd-Fe2O4 Nanocomposites","authors":"Hanaa Sh. Ahmed,&nbsp;Salah R. Saeed,&nbsp;Ali M. Mohammad","doi":"10.1007/s10948-025-06988-7","DOIUrl":"10.1007/s10948-025-06988-7","url":null,"abstract":"<div><p>Developing effective antibacterial agents has become an important challenge, especially with the increasing prevalence of antibiotic-resistant bacteria. Spinel ferrite nanocomposites have attracted considerable interest in biomedical applications due to their magnetic properties and antibacterial potential. The study investigates the effects of calcination temperatures (350, 450, and 550 °C) on the magnetic and antibacterial properties of Co_0.6Ni_0.2Cd_0.2Fe₂O₄ spinel nanocomposites synthesized using the sol–gel method. Understanding this relationship will provide valuable insights into optimizing ferrite-based nanomaterials for medical applications, particularly as antibacterial agents. The resulting nanocomposite was characterized using various techniques. X-ray diffraction study verified the existence of a pristine spinel phase in the specified spacing group of <span>(Fdoverline{3 }m)</span>. In addition, the crystal size slowly grew from 36.74 nm to 41.29 nm as the calcination temperature rose from 350 °C to 550 °C, but the average strain values went down from 1.79 to 1.56. The field emission-scanning electron microscopy analysis showed that the average particle size of Co_0.6Ni_0.2Cd_0.2Fe₂O₄ ferrite was 39.83, 40.96, and 41.60 nm at different calcination temperatures. The energy-dispersive X-ray spectroscopy has also confirmed the presence of Co, Ni, Cd, Fe, and O in all samples. Fourier transform infrared spectroscopy revealed the fingerprint bands υ₁ (~ 578) and υ₂ (~ 381) at 550 °C. Vibrating sample magnetometer analysis revealed that saturation magnetization increases from 53.95 to 57.37 emu/g¹ at 350 and 550 °C, respectively. The antibacterial examination performed via the agar well diffusion technique demonstrated that the Gram-positive bacteria, such as <i>Staphylococcus aureus</i> and <i>Streptococcus mutans</i>, were the most sensitive strains. They exhibited significant susceptibility at the highest concentration of 500 µg/mL (± 25 mm and ± 24 mm). In contrast, Gram-negative bacteria, including <i>Acinetobacter baumannii</i> and <i>Escherichia coli</i>, showed slightly less sensitivity (± 16.2 mm and ± 15 mm). Overall, the synthesized Co_0.6Ni_0.2Cd_0.2Fe₂O₄ spinel nanocomposite demonstrated potent antibacterial activity and can be considered a promising material for biomedical applications.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100297","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}

{"title":"Synthesis and Applications of Magnetic Zeolites: A Comprehensive Review","authors":"Deqi Tang,&nbsp;Manas Pal,&nbsp;Tao Meng,&nbsp;Dongsen Mao,&nbsp;Zhaoteng Xue","doi":"10.1007/s10948-025-06986-9","DOIUrl":"10.1007/s10948-025-06986-9","url":null,"abstract":"<div><p>Magnetic zeolites are gaining a lot of attention for their potential in adsorption and catalytic applications. This review summarizes the structural characteristics and synthesis methods of three types of magnetic zeolites: internal magnetic zeolites, external magnetic zeolites, and complex magnetic zeolites. The application properties of various magnetic zeolites are discussed in detail, including their use in heavy metal adsorption, ammonia nitrogen removal from wastewater, radioactive waste adsorption, and oil contamination removal. Numerous studies have demonstrated that magnetic zeolites possess high magnetization (e.g., &gt; 4 emu·g⁻¹), enabling rapid and efficient magnetic separation of zeolite adsorbents. Magnetic zeolites also exhibit excellent adsorption and catalytic performance, maintaining their effectiveness even after multiple cycles (e.g., more than five cycles).</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084811","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}

{"title":"Half-Metallic Ferromagnetism in UCu2X2 (X = P, As) Zintl Compounds: Exploring the Magnetic Stability, Electronic Structure, Exchange Interactions, and Implications for Next-Generation Storage Technologies","authors":"Sadia Yasin,&nbsp;Dhafer O. Alshahrani,&nbsp;Hayat Ullah,&nbsp;Aijaz Rasool Chaudhry,&nbsp;Ghulam Murtaza","doi":"10.1007/s10948-025-06983-y","DOIUrl":"10.1007/s10948-025-06983-y","url":null,"abstract":"<div><p>The pursuit of half-metallic ferromagnets with 100% spin polarization at room temperature remains an ongoing challenge. This study employs density functional theory to investigate the structural, electronic, and magnetic properties of Zintl compounds UCu₂X₂ (X = P, As). The local density approximation (LDA) and generalized gradient approximation (GGA) have been employed within the full-potential linearized augmented plane wave plus local orbital (FP-LAPW + lo) method as exchange–correlation functionals. Additionally, the GGA + U approach and various versions of the modified Becke-Johnson (mBJ) potential were utilized to obtain more accurate results. Notably, the calculated lattice constants and c/a ratio for UCu₂P₂ are in excellent agreement with experimental values. The results confirm the thermodynamic stability and robust atomic interactions of these compounds. It is discovered that all UCu₂X₂ (X = P, As) Zintl compounds achieve their lowest ground state energy in the FM state as compared to the NM state. Electronic structure calculations reveal that UCu₂X₂ exhibits half-metallic behavior, characterized by 100% spin polarization, an indirect band gap of 0.7 eV, and strong hybridization between X-s/p and U-f/d states. The compounds also display spin gapless semiconducting behavior and double exchange interaction, validating their half-metallic ferromagnetic nature. The ferromagnetism is primarily attributed to the appearance of one 5d-electron outside the final rare earth element’s filled 14-electron 4f shell. The U and Cu atoms contribute most significantly to the total magnetic moment, with minor contributions from interstitial regions. The presence of integer magnetic moments further corroborates the half-metallic ferromagnetic nature of UCu₂X₂, providing clear evidence of this phenomenon. The computed Curie temperatures are 0.0116 × 10⁵ K and 0.0323 × 10⁵ K for UCu₂P₂ and UCu₂As₂, respectively. These findings highlight the potential of UCu₂X₂ for applications in next-generation storage devices and spintronics, offering a promising avenue for further research and development.\u0000</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143932334","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}

{"title":"Chaotic Dynamics in Spin Torque Nano-oscillator Driven by Voltage Feedback","authors":"Meenakshi Sravani,&nbsp;Swapnil Bhuktare","doi":"10.1007/s10948-025-06980-1","DOIUrl":"10.1007/s10948-025-06980-1","url":null,"abstract":"<div><p>Non-linear dynamics, including auto-oscillations, chaotic dynamics, and synchronization, are integral to physical and biological applications and can be excited in spintronic devices. In this study, we are interested in exploring the excitation of chaos using voltage feedback in a spin torque nano-oscillator using a Magnetic Tunnel Junction (MTJ). According to the Poincaré-Bendixson theorem, chaos cannot arise in a two-dimensional system of MTJ featuring two dynamic variables describing the zenith and azimuth angles of magnetization. Hence, we prefer the feedback system as it creates a multi-dimensional system, making it interesting to explore the emergence of chaos in such systems. Such feedback is achieved by utilizing a 3-terminal device consisting of an MTJ with an in-plane pinned layer (PL) and an out-of-plane free layer (FL) geometry. When a DC current above the critical threshold is applied, the FL’s oscillating magnetization generates an AC output voltage through the Tunnel Magneto Resistance (TMR) effect. A fraction of this voltage, fed back after a delay, modulates the FL’s anisotropy via voltage controlled magnetic anisotropy (VCMA) effect, potentially driving chaotic dynamics or oscillator death based on the feedback delay and gain of the feedback circuit. The observed chaotic regime has been studied by evaluating the Lyapunov exponent, bifurcation diagrams, Fourier spectral analysis, and reconstruction of the trajectory in embedding phase space. Such observed chaotic dynamics can find practical applications in random number generators and physical reservoir computing.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904832","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}

{"title":"Critical Behavior, Phenomenological Model, Electrical and Dielectric Properties of La0.67−xPrxBa0.33MnO3 (x = 0.1 and 0.2) Manganites","authors":"Ameni Hidri,&nbsp;Latifa ben ammar,&nbsp;M. Nasri,&nbsp;J. Khelifi,&nbsp;E. K. Hlil","doi":"10.1007/s10948-025-06977-w","DOIUrl":"10.1007/s10948-025-06977-w","url":null,"abstract":"<div><p>In this study, we examined the magnetic and electrical properties of sol–gel-prepared polycrystalline manganites La_{0.67−<i>x</i>}Pr_<i>x</i>Ba_0.33MnO₃ (<i>x</i> = 0.1 and 0.2). The temperature-dependent magnetization reveals that as the temperature decreases, the samples undergo a second-order phase transition from the paramagnetic to the ferromagnetic state. We explore the correlation between experimental findings and theoretical analysis based on phenomenological models that effectively simulate magnetic and magnetocaloric measurements. The predicted maximum magnetic entropy change (Δ<i>S</i>_max) under a 5 T magnetic field is 5.8 J kg⁻¹ K⁻¹ for <i>x</i> = 0.1 and 3.33 J kg⁻¹ K⁻¹ for <i>x</i> = 0.2. Furthermore, we estimate the relative cooling power and specific heat capacity, suggesting that these compounds could be promising candidates for magnetic refrigeration at low temperatures. In addition, the electrical characteristics of La_{0.67−<i>x</i>}Pr_<i>x</i>Ba_0.33MnO₃ (<i>x</i> = 0.1 and <i>x</i> = 0.2) were investigated over a wide range of temperatures (120 to 380 K) and frequencies (40 to 10⁷ Hz) by means of impedance spectroscopy. A transition from semiconducting to metallic behavior is observed at 300 K. Charge carrier hopping between Mn³⁺ and Mn⁴⁺ ions has also been explored with regard to its effects on frequency, temperature, and composition, particularly in relation to permittivity (<i>ε</i>′, <i>ε</i>″) and dielectric loss (tan <i>δ</i>).</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908848","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}