Journal of Magnetism and Magnetic Materials最新文献

{"title":"Improvement of the spin-valley polarization and tunneling magnetoresistance in magnetic silicene superlattices by means of aperiodic Kolakoski order","authors":"J.G. Rojas-Briseño,&nbsp;P. Villasana-Mercado,&nbsp;S. Molina-Valdovinos,&nbsp;R. Rodríguez-González,&nbsp;I. Rodríguez-Vargas","doi":"10.1016/j.jmmm.2025.172871","DOIUrl":"10.1016/j.jmmm.2025.172871","url":null,"abstract":"<div><div>Aperiodic order is quite relevant in science and technology. The aperiodic order is characterized by the so-called aperiodic sequences. Among the most important sequences we can find the Fibonacci, Thue–Morse, and Cantor sequences. The Thue–Morse and Cantor sequence have been instrumental in improving the spin-valley polarization and tunneling magnetoresistance (TMR) of magnetic silicene superlattices (MSSLs). Here, we study the impact of aperiodic Kolakoski order on the spin-valley polarization and TMR of MSSLs. The spin-valley polarization and TMR of Kolakoski (K-) MSSLs are compared with the ones of periodic (P-), Thue–Morse (TM-), and Cantor (C-) MSSLs. We find that the higher degree of disorder of the Kolakoski sequence reduces the total conductance of the antiparallel magnetization configuration, resulting in an effective enhancement of the TMR. Also, the aperiodic Kolakoski order gives rise to energy regions of two well-defined spin-valley polarization states accessible by switching the magnetization direction. The aperiodic Kolakoski order in conjunction with structural asymmetry can optimize the spin-valley polarization and TMR of MSSLs. The spin-valley polarization and TMR capabilities of K-MSSLs are superior than the ones of P-, TM-, and C-MSSLs.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"619 ","pages":"Article 172871"},"PeriodicalIF":2.5,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143463348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Temperature dependence of spin-polarization in FIS graphene junction","authors":"Hamidreza Emamipour","doi":"10.1016/j.jmmm.2025.172870","DOIUrl":"10.1016/j.jmmm.2025.172870","url":null,"abstract":"<div><div>We study the effect of temperature on spin polarization in graphene-based ferromagnet insulator superconductor (FIS) junctions, theoretically. Within the framework of BTK (Blonder Tinkham Klapwijk) theory we find that when <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>F</mi></mrow></msub></math></span> is selected near to <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>x</mi></mrow></msub></math></span> (where <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>F</mi></mrow></msub></math></span> and <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>x</mi></mrow></msub></math></span> represent Fermi energy and exchange field in the ferromagnet region) and temperature approaches to <span><math><msub><mrow><mi>T</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span> spin-polarization gets 100%. This case implies the spin-polarization is generated by just one spin species i.e. spin-up current, (<span><math><msub><mrow><mi>I</mi></mrow><mrow><mi>u</mi></mrow></msub></math></span>). We also obtain a phase diagram <span><math><mrow><msub><mrow><mi>E</mi></mrow><mrow><mi>x</mi></mrow></msub><mo>−</mo><mi>T</mi></mrow></math></span> which distinguishes SAR (specular Andreev reflection) from NAR (normal Andreev reflection). Therefore, the proposed junction may be applied not only to create huge spin-polarization which is significant in spintronic-industry but also to discriminate SAR and NAR from each other which is important in fundamental condensed matter physics.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"618 ","pages":"Article 172870"},"PeriodicalIF":2.5,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Open static magnetic cloak based on DC magnetic metamaterials","authors":"Yangrong Chen ,&nbsp;Hanchuan Chen ,&nbsp;Fei Sun ,&nbsp;Yichao Liu ,&nbsp;Xiaoxiao Wu ,&nbsp;Haitao Li ,&nbsp;Zhixing Zhang ,&nbsp;Qianhan Sun","doi":"10.1016/j.jmmm.2025.172885","DOIUrl":"10.1016/j.jmmm.2025.172885","url":null,"abstract":"<div><div>Due to the significant applications of static magnetic field invisibility in avoiding metal detector detection, it has received extensive attention in recent years. However, most existing methods (e.g., multilayer closed structures based on DC magnetic metamaterials) achieve closed invisibility, hindering the exchange of information and materials between the cloak’s interior and the external environment. In this study, a DC magnetic field shifter is designed based on transformation magnetostatics and then combined with a specially designed closed DC magnetic cloak with a hole to develop an open static magnetic cloak. Numerical simulations verify the invisibility effect and multi-directional effectiveness of this open cloak. Finally, effective medium theory is utilized to achieve the open static magnetic field cloak by arranging isotropic media specifically, whose effectiveness is validated through numerical simulations.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"619 ","pages":"Article 172885"},"PeriodicalIF":2.5,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The role of W seed and spacer layers on the magnetic properties of Co/Pt multilayers","authors":"M. Tokaç ,&nbsp;H. Pişkin ,&nbsp;G. Ekinci ,&nbsp;B. Özkal ,&nbsp;S. Kazan","doi":"10.1016/j.jmmm.2025.172869","DOIUrl":"10.1016/j.jmmm.2025.172869","url":null,"abstract":"<div><div>The selection of seed and spacer layers is critical in influencing the magnetic properties of thin films, where these layers impact the microstructure, interface quality, and overall magnetic behavior of the thin films. The magnetic properties of Co/Pt multilayers have been investigated where the choice of seed and spacer layers is crucial for tailoring their magnetic properties. These layers influence the interfacial structure, and electronic environment, all of which contribute to variations in the effective demagnetizing field, g-factor, saturation magnetization, and perpendicular surface anisotropy constants. Ferromagnetic resonance has been used to investigate the enhancement of the Gilbert damping parameter, where the damping parameter is higher for the Cu/Co/Pt multilayers across the entire Co thickness range. In contrast, the presence of W layers on both sides of the Co layer leads to a reduction in the damping parameter. The higher spin-mixing conductance in the Co/Pt structure is linked to stronger SOC and enhanced orbital hybridization at the Co/Pt interface. As a consequence of their effects on spin–orbit interactions, spin-pumping efficiency, and interfacial quality, our results emphasize the critical role that interface characteristics play in improving damping in Co/Pt systems.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"618 ","pages":"Article 172869"},"PeriodicalIF":2.5,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization and evaluation of commercial tracers for x-space magnetic particle imaging","authors":"Eric Daniel Imhoff ,&nbsp;Andrii Melnyk ,&nbsp;Carlos M. Rinaldi-Ramos","doi":"10.1016/j.jmmm.2025.172889","DOIUrl":"10.1016/j.jmmm.2025.172889","url":null,"abstract":"<div><div>Commercial magnetic particle imaging (MPI) tracers are utilized for many applications including as reference materials for comparing tracer performance, but comparative measurements of many tracers on a single imaging platform are uncommon. This study uses relaxometry and 2D imaging in a pre-clinical MOMENTUM scanner to characterize and evaluate the performance of six common commercial tracers for MPI: Synomag-D Plain, Synomag-D NH2, Synomag-D PEG, Perimag, Vivotrax, and Vivotrax Plus. Repeated measurements of samples showed considerable variability while inter-sample differences were generally negligible. Sensitivity between the two modes is strongly correlated while resolution of the two modes was only moderately correlated. Further, relaxometric measurements tend to predict better resolution than is achieved in 2D imaging. All evaluated tracers have resolutions within 1 mm of each other on the MOMENTUM imager. These results illustrate that relaxometer measurements can be used to broadly predict MPI performance but do not accurately recreate the physical processes or differences in hardware and software of MPI. This study provides MPI measurements of tracers that may be useful to researchers while highlighting the challenges of making comparisons between tracers due to variation within samples and across different measurement techniques and instruments.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"620 ","pages":"Article 172889"},"PeriodicalIF":2.5,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nonvolatile electrical control of magnetism of monolayer C2N via carrier doping in a two dimensional heterostructure","authors":"Changwei Wu,&nbsp;Yun Xie,&nbsp;Weiping Gong","doi":"10.1016/j.jmmm.2025.172857","DOIUrl":"10.1016/j.jmmm.2025.172857","url":null,"abstract":"<div><div>Nonvolatile electrical control of magnetism in two-dimensional (2D) van der Walls heterostructure has sparked significant interest for both understanding the fundamental magnetoelectric physics and device application. Here, using the first-principles calculations, we propose a new multiferroic van der Waals (vdW) heterostructure <span><math><mrow><msub><mrow><mi>C</mi></mrow><mrow><mn>2</mn></mrow></msub><mi>N</mi></mrow></math></span>/<span><math><mrow><msub><mrow><mi>In</mi></mrow><mrow><mn>2</mn></mrow></msub><msub><mrow><mi>Se</mi></mrow><mrow><mn>3</mn></mrow></msub></mrow></math></span> based on C₂N and ferroelectric (FE) In₂Se₃ relying on no-transition metals. Upon electron doping, <span><math><mrow><msub><mrow><mi>C</mi></mrow><mrow><mn>2</mn></mrow></msub><mi>N</mi></mrow></math></span>/<span><math><mrow><msub><mrow><mi>In</mi></mrow><mrow><mn>2</mn></mrow></msub><msub><mrow><mi>Se</mi></mrow><mrow><mn>3</mn></mrow></msub></mrow></math></span>-<span><math><mrow><mi>P</mi><mi>↓</mi></mrow></math></span> maintains nonmagnetic nature, but <span><math><mrow><msub><mrow><mi>C</mi></mrow><mrow><mn>2</mn></mrow></msub><mi>N</mi></mrow></math></span>/<span><math><mrow><msub><mrow><mi>In</mi></mrow><mrow><mn>2</mn></mrow></msub><msub><mrow><mi>Se</mi></mrow><mrow><mn>3</mn></mrow></msub></mrow></math></span>-<span><math><mrow><mi>P</mi><mi>↑</mi></mrow></math></span> changes into ferromagnetic state. Moreover, the magnetoelectric coupling is enhanced via engineering interlayer distance of <span><math><mrow><msub><mrow><mi>C</mi></mrow><mrow><mn>2</mn></mrow></msub><mi>N</mi></mrow></math></span>/<span><math><mrow><msub><mrow><mi>In</mi></mrow><mrow><mn>2</mn></mrow></msub><msub><mrow><mi>Se</mi></mrow><mrow><mn>3</mn></mrow></msub></mrow></math></span>. The magnetic moment of <span><math><mrow><msub><mrow><mi>C</mi></mrow><mrow><mn>2</mn></mrow></msub><mi>N</mi></mrow></math></span>/<span><math><mrow><msub><mrow><mi>In</mi></mrow><mrow><mn>2</mn></mrow></msub><msub><mrow><mi>Se</mi></mrow><mrow><mn>3</mn></mrow></msub></mrow></math></span>-<span><math><mrow><mi>P</mi><mi>↑</mi></mrow></math></span> reaches 1.0 <span><math><msub><mrow><mi>μ</mi></mrow><mrow><mi>B</mi></mrow></msub></math></span>/e over the electron concentration ranging from 0.1 to 0.4 e per unit cell at an interlayer distance of 3.2 Å. Our results broaden the materials design space for 2D multiferroic materials.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"618 ","pages":"Article 172857"},"PeriodicalIF":2.5,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143429137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Realizing new Janus 2D spintronic materials from the non-magnetic 1T-PdSO monolayer through vacancy defects and doping","authors":"Lahcen Aznague ,&nbsp;Moussa Kibbou ,&nbsp;Zakaryae Haman ,&nbsp;El-m’feddal Adadi ,&nbsp;Ismail Essaoudi ,&nbsp;Abdelmajid Ainane","doi":"10.1016/j.jmmm.2025.172848","DOIUrl":"10.1016/j.jmmm.2025.172848","url":null,"abstract":"<div><div>Two-dimensional Janus materials are highly promising for spintronic applications due to their asymmetric structures and tunable properties. This study explores the magnetic properties of the PdSO monolayer induced by dopant elements, using first-principles calculations. The pristine monolayer is a semiconductor with an indirect band gap of 0.90 eV (PBE) and 1.78 eV (HSE06). Pd-vacancies induce half-metallicity and a magnetic moment of 4.00 <span><math><msub><mrow><mi>μ</mi></mrow><mrow><mi>B</mi></mrow></msub></math></span>, while O and S-vacancies reduce the band gap without inducing magnetism. Transition metal doping (V, Cr, Mn, Fe) and non-metal doping (B, C, N, F) significantly alter magnetic properties. Mn-doping creates a diluted magnetic semiconductor, while V, Cr, and Fe-doping results in half-metallicity. Non-metal dopants like B, N, and F induce magnetization, while C-doping leads to a non-magnetic semiconductor state. These results highlight effective strategies for magnetizing PdSO monolayers for spintronic applications.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"618 ","pages":"Article 172848"},"PeriodicalIF":2.5,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"NdFeB coercivity enhancement and temperature coefficient reduction by Pr-Dy-Co diffusion","authors":"Kehan Ren ,&nbsp;Qing Li ,&nbsp;Shuai Cao ,&nbsp;Xiangming Lu ,&nbsp;Jiateng Zhang ,&nbsp;Shengzhi Dong ,&nbsp;Shuai Guo ,&nbsp;Renjie Chen ,&nbsp;Aru Yan","doi":"10.1016/j.jmmm.2025.172856","DOIUrl":"10.1016/j.jmmm.2025.172856","url":null,"abstract":"<div><div>Grain boundary diffusion is utilized to enhance magnetic properties by modulating the organizational structure of the magnet surface layer and optimizing the grain boundary structure. In this study, diffusion sources of Pr<em>_x</em>Dy_58-<em>_x</em>Co₄₂ (<em>x</em> = 0, 15, 30, 45, and 58 at%) alloys were designed to increase the coercivity while reducing the Dy consumption. The results indicate that when the Pr content in the diffusion source reached 45 %, coercivity increased significantly from 13.87 kOe to 21.76 kOe. In addition, the thermal stability and Curie temperature of the magnet were improved considerably. The increase in Pr content also led to a significant increase in the grain boundary phases of the diffused magnets. This is attributed to the introduction of Pr, which facilitates the formation of grain boundary phases and enhances demagnetization coupling between the main phases. The Pr₄₅Dy₁₃Co₄₂ alloy investigated in this study provides novel insights into the potential design of diffusion sources.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"618 ","pages":"Article 172856"},"PeriodicalIF":2.5,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143445945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coherent manipulation of the surface plasmon resonance sensing at the dielectric-graphene interface under Cross-Kerr nonlinearity effect","authors":"Qaisar Khan ,&nbsp;Mostafa R. Abukhadra ,&nbsp;Ahmed M. El-Sherbeeny ,&nbsp;Jeong Ryeol Choi ,&nbsp;Asghar Ali ,&nbsp;Majid Khan","doi":"10.1016/j.jmmm.2025.172858","DOIUrl":"10.1016/j.jmmm.2025.172858","url":null,"abstract":"<div><div>Sensitivity of surface plasmon polaritons (SPPs) resonance sensing is coherently controlled and modified at the dielectric medium and graphene interface under the cross Kerr nonlinear fluctuation of the dielectric function. The useful control over the sensitivity of the SPPs by control and Kerr fields is reported. The angular interrogation of sensitivity of the SPPs under the Kerr nonlinearity effect is written as <span><math><mrow><mi>d</mi><mi>θ</mi><mo>/</mo><mi>d</mi><msubsup><mrow><mi>n</mi></mrow><mrow><mi>d</mi></mrow><mrow><mi>k</mi></mrow></msubsup></mrow></math></span>. The sensitivity of the SPPs depends on the driving fields parameters such as control and probe fields detuning and control field Rabi frequency as well as decay rate. The sensitivity is a function of probe field detuning, the maximum value of sensitivity of the SPPs is reported to be 3000 deg/RIU with probe field detuning. Whereas the minimum sensitivity is investigated to be 400 deg/RIU with probe fields detunings. The reported results in this manuscript is useful applications in data storage, solar cell, sensor devices and plasmonster technology.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"618 ","pages":"Article 172858"},"PeriodicalIF":2.5,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Canted magnetism and topological spin texture induced in silicon from flexoelectronic proximity effect","authors":"Ravindra G. Bhardwaj ,&nbsp;Anand Katailiha ,&nbsp;Paul C. Lou ,&nbsp;W.P. Beyermann ,&nbsp;Sandeep Kumar","doi":"10.1016/j.jmmm.2025.172886","DOIUrl":"10.1016/j.jmmm.2025.172886","url":null,"abstract":"<div><div>The flexoelectronic effect leads to charge carrier transfer between two dissimilar materials, a combination of metal and doped semiconductor, when they are brought into contact under an applied strain gradient. The flexoelectronic effect may lead to continuity of electronic wavefunction and order parameter across the interface, which is called as flexoelectronic proximity effect. This study experimentally demonstrates flexoelectronic proximity effect induced canted magnetic moment in the doped p-Si thin film from ferromagnetic permalloy thin film, which give rise to RKKY interlayer exchange interaction between permalloy and p-Si layers. The canted magnetic moment manifests topological spin-Seebeck effect response in magneto-thermoelectric measurements. The topological spin-Seebeck effect is likely to arise due to inverse spin-Hall effect from topological spin texture; possibly a three-dimensional analogue of the hexagonally warped helical spin texture. This work demonstrates that thermal modulation of strain gradient can be used to tune RKKY interlayer exchange interaction between Py and p-Si from ferromagnetic to antiferromagnetic as well as magnitude of the canted magnetic moment. The canted magnetic moment and topological spin texture behavior can also be controlled by varying the thickness of the p-Si layer. The flexoelectronic proximity effect and topological spin texture can enable Si based spin, magnetic, topological and quantum applications.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"618 ","pages":"Article 172886"},"PeriodicalIF":2.5,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}