Journal of Superconductivity and Novel Magnetism最新文献

{"title":"Single Crystal Growth, Transport Phenomena, and Upper Critical Field of Alkali Metal-Based K(_x)Fe(_{2-y})(Se,S)(_2) Iron Chalcogenides","authors":"Tatiana Kuzmicheva,&nbsp;Leonid Morgun,&nbsp;Sergey Gavrilkin,&nbsp;Svetoslav Kuzmichev,&nbsp;Alena Degtyarenko,&nbsp;Andrei Muratov,&nbsp;Ilya Zhuvagin,&nbsp;Andrey Shilov,&nbsp;Yevgeny Rakhmanov,&nbsp;Igor Morozov","doi":"10.1007/s10948-025-06963-2","DOIUrl":"10.1007/s10948-025-06963-2","url":null,"abstract":"<div><p>We have grown large (8–10 mm in dimension) single crystals of K<span>(_{0.8})</span>Fe<span>(_{1.7})</span>(Se<span>(_{0.73})</span>S<span>(_{0.27})</span>)<span>(_2)</span> composition with partial isovalent (Se,S) substitution related to the 122-Se family of iron-chalcogenide superconductors. High quality and homogeneity of the superconducting properties below <span>(T_c approx 26)</span> K were confirmed using X-ray diffraction, electron microscopy, energy dispersive X-ray spectroscopy, transport, and magnetic probes. Using detailed magnetotransport R(T) probes in magnetic fields up to 16 T in two field orientations (in-plane <span>(H parallel ab)</span> and out-of-plane <span>(H parallel c)</span>), we determined temperature dependences of the upper critical field <span>(mu _0H_{c2}^{ab}(T))</span> and <span>(mu _0H_{c2}^c(T))</span>, magnetic anisotropy <span>(gamma approx 3.5)</span> in the vicinity of <span>(T_c)</span>, and estimate zero-temperature values <span>(mu _0H_{c2}^{ab}(0) approx 99)</span> T, <span>(mu _0H_{c2}^c(0) approx 28)</span> T.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 2","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749195","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":"Evidence of Cluster Glass-Like Behavior in (Dy(_{0.6})Gd(_{0.4}))(_{5})Pd(_{2})","authors":"Shuvendu Ghosh,&nbsp;Tapas Paramanik","doi":"10.1007/s10948-025-06961-4","DOIUrl":"10.1007/s10948-025-06961-4","url":null,"abstract":"<div><p>A systematic investigation of the magnetic properties using AC susceptibility measurements has been performed in (Dy<span>(_{0.6})</span>Gd<span>(_{0.4})</span>)<span>(_{5})</span>Pd<span>(_{2})</span> compound. The <span>(chi ')</span> curve showed a peak <span>(T_{g1}approx )</span> 59 K and a weak hump-like behavior at low temperatures. Interestingly, the <span>(chi '')</span> curve displayed two frequency-dependent distinct peaks, one at <span>(T_{g1})</span> and other at <span>(T_{g2}approx )</span> 16 K. An obtained value of the relative shift in freezing temperatures <span>(delta T_{f1}approx )</span> 0.017 and <span>(delta T_{f2}approx )</span> 0.07 are obtained from the AC susceptibility data reflects the formation of double cluster-glass states. The frequency dependence of T<span>(_f)</span> is also analyzed within the framework of dynamic scaling laws such as power law and Vogel-Fulcher law. The analysis using power law yields a characteristic time constant for a single spin flip is <span>(tau ^*=)</span> <span>(1.55 times 10^{-9})</span> s and critical exponent <span>(znu '=)</span> 3.53 for the temperature <span>(T_{g1})</span>. Whereas <span>(tau ^*=)</span> <span>(3.98 times 10^{-6})</span> s and critical exponent <span>(znu '=)</span> 1.89 for the temperature <span>(T_{g2})</span>. Further evidence of cluster-glass behavior comes from the frequency dependence of the freezing temperature fitted with the Vogel-Fulcher law. Values of fitting parameters are, Vogel-Fulcher temperature T<span>(_0 approx 54.38)</span> K, an activation energy <span>( E_a / k_Bapprox 69.18 )</span> K and <span>( E_a / k_BT_0approx 1.27 &gt; 1 )</span> for <span>(T_{g1})</span>; T<span>(_0 approx 14.24)</span> K, <span>( E_a / k_Bapprox 14.71 )</span> K, and <span>( E_a / k_BT_0approx 1.03 &gt; 1 )</span> for <span>(T_{g2})</span>. The nonzero values of T<span>(_0)</span> and <span>( E_a / k_BT_0 )</span> further support the evidence for the cluster-glass behavior. The magnetic contribution to the specific heat follows a <span>( T^{3/2} )</span> temperature dependence below the cluster-glass freezing temperature, also supporting the evidence for cluster-glass behavior.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 2","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740872","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":"Study of the Stability, Mechanical, Thermal, Thermoelectric, Electronic and Magnetic Properties of Full Heusler Co2XSn (X = Ti, V): using DFT Approximation","authors":"A. El Galta,&nbsp;R. Masrour","doi":"10.1007/s10948-025-06953-4","DOIUrl":"10.1007/s10948-025-06953-4","url":null,"abstract":"<p>Structural, electronic, magnetic, thermodynamic, thermal and elastic characteristics of the full-Heusler compounds Co₂XSn (X = Ti, V) have been investigated using the full-potential linearized augmented plane wave (FP-LAPW) method, which is based on density functional theory (DFT) within the wien2k code. The exchange–correlation effects were treated using the generalized gradient approximation (GGA) and GGA + U. Structural optimizations confirmed that the equilibrium lattice parameters are in harmony with the existing experimental data. The calculated formation energies and elastic parameters demonstrate the stability of these alloys. It was also observed that the studied compounds exhibit a ductile structure and anisotropic behavior. The band structure and density of states calculations reveal that the majority spin bands exhibit metallic behavior, while the minority spin bands are semiconducting with band gap for Co₂TiSn and Co₂VSn. These materials exhibit half-metallic behavior with a magnetic moment of 2 μ_B and 3 μ_B for Co₂TiSn and Co₂VSn respectively, in accordance with the Slater-Pauling rule and showing 100% spin polarization. Furthermore, their Curie temperatures (T_c) were estimated at 384.82 K (GGA-PBE) and 385.18 K (GGA + U) for Co₂TiSn, in good agreement with experimental data, while for Co₂VSn, a theoretical value of 566 K was obtained in the absence of an experimental reference. The transport properties, including electrical and thermal conductivity, the Seebeck coefficient, and the Figure of merit have been investigated to evaluate their thermoelectric response. Additionally, key thermodynamic parameters, such as the Debye temperature, thermal expansion coefficient and specific heat were calculated. These results highlight the potential of these compounds for spintronic and thermoelectric applications, demonstrating their promising multifunctional properties beyond existing studies.</p>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 2","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143717052","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 Properties of Magnetic Fields of the Josephson Vortex Lattice Bi2Sr2CaCu2O8+δ in Highly Anisotropic Superconductors by Scanning Hall Probe Microscopy","authors":"Shaima H. Z. Al-Qadi,&nbsp;Hussein Ali Mohammed,&nbsp;Malak Jaafar Ali,&nbsp;Malik H. Kheder","doi":"10.1007/s10948-025-06964-1","DOIUrl":"10.1007/s10948-025-06964-1","url":null,"abstract":"<div><p>In the “crossing lattices” domain of cuprate superconductors with extreme anisotropies, scanning Hall probe microscopy (SHPM) has shown how Josephson vortex lattice (JV) interacts with pancake vortices (PV) in single Bi₂Sr₂CaCu₂O_8+δ (2212) crystals under enormous in-plane fields. Using SHPM, researchers have examined vortex formations in the regime of interacting crossing lattices subjected to in- and out-the-plane magnetic fields. We establish a rich vortex phase diagram that depends on both in- and out-the-plane magnetic fields and is dominated by a field-driven change in the underlying Josephson vortex lattice structure, while the evolution of vortex chain structures at small in-plane fields as the out-of-plane field increases, and find especially stable composite structures made up of chains divided by one or more rows of free pancake vortex stacks. We are also able to follow the interchain distance is inversely proportional to the in-plane field. Our results are these chains provide light on the superconducting regime of crossing vortex lattices in very anisotropic cuprates.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 2","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143726643","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":"Formation of Nb3Sn Nanocrystalline Layers in Cu-Sn/Nb Superconducting Composites Under Different Diffusion Annealing Modes","authors":"Irina Deryagina,&nbsp;Elena Popova,&nbsp;Evgeniya Valova-Zaharevskaya,&nbsp;Evgeny Patrakov,&nbsp;Ildar Abdyukhanov,&nbsp;Anastasia Tsapleva,&nbsp;Maxim Alexeev","doi":"10.1007/s10948-025-06962-3","DOIUrl":"10.1007/s10948-025-06962-3","url":null,"abstract":"<div><p>Nb₃Sn-based superconductors are used in high-field magnets of various research projects, including magnetic systems of Tokamak thermonuclear fusion and accelerators for high-energy physics. An important task aimed at improving the current-carrying characteristics of the wire is to study the effect of design features and alloying of multifilamentary strands and the heat treatment modes on the formation of superconducting layers with an optimal structure, namely, with fine equiaxed grains of Nb₃Sn phase with close to stoichiometry composition. This study presents the results of scanning and transmission electron microscopy examination of the structure and morphology of Nb₃Sn layers in multifilamentary superconducting bronze-processed strands, with coupled Nb filaments doped with Ti, after various heat treatment (diffusion annealing) modes. The study used single-stage and two-stage annealing with different temperatures and durations.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 2","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706903","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":"A Novel Method for Identifying the Magnetic Interaction and Reversal Mechanisms in Nickel Nanowires Using FORC Diagrams and Micromagnetic Slicing","authors":"Yaqi Jiang,&nbsp;Jiaqi Feng,&nbsp;Guoqing Liu,&nbsp;Zixuan Chen,&nbsp;Qin Xu,&nbsp;Junmeng Zhang,&nbsp;Guangyu Wen,&nbsp;Peipei Lu,&nbsp;Lihu Liu,&nbsp;Huiyuan Sun","doi":"10.1007/s10948-025-06958-z","DOIUrl":"10.1007/s10948-025-06958-z","url":null,"abstract":"<div><p>In this work, 1-D nickel nanowires with different diameters were synthesized. Magnetic properties of the products were investigated by using first-order reversal curves (FORC) experimental testing, and magnetization reversal processes were theoretically simulated based on the Object Oriented Micro Magnetic Framework (OOMMF) software. The experimental results show different shapes of FORC patterns, indicating the influence of the diameter on the magnetization switching processes of the nanowires. Micromagnetic simulations were carried out on a model of two parallel cylindrical nanowire systems, and the simulation results indicated that both the shape anisotropy and magnetostatic interactions played important roles in identifying the magnetization reversal processes. Furthermore, by means of micromagnetic slicing, the real time distribution status of magnetic moments in the two parallel nickel nanowires had been illustrated visually, which showed that the magnetization reversal process in the two parallel nanowires were different especially in the <i>x</i> and <i>y</i> directions, although of the same objective condition.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 2","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688385","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":"On Trapped Flux in a Small Crystal of CaKFe(_4)As(_4) and Implications for High-Pressure Hydrides","authors":"J. E. Hirsch,&nbsp;F. Marsiglio","doi":"10.1007/s10948-025-06948-1","DOIUrl":"10.1007/s10948-025-06948-1","url":null,"abstract":"<div><p>In recent work (Bud’ko et al. Supercond. Sci. Technol. <b>37</b>, 065010 2024), Bud’ko et al. present experimental results for trapped magnetic flux for a tiny sample of a type II superconductor, <span>(CaKFe_4As_4)</span>. The paper aims to provide evidence in support of the interpretation that similar measurements performed in samples of hydrogen-rich materials under high pressure by Minkov et al. (Nat. Phys. <b>19</b>, 1293 2023) are conclusive evidence (Eremets Nat. Sci. Rev. <b>11</b>, nwae047 2024) for superconductivity in hydrides under pressure. Here, we point out that the new evidence presented by Bud’ko et al. (Supercond. Sci. Technol. <b>37</b>, 065010 2024) further supports our interpretation (Hirsch and Marsiglio J. Supercond. Nov. Magn. <b>35</b>, 3141–3145 2022; Hirsch and Marsiglio Phys. C <b>620</b>, 1354500 2024) that the reported measurements of trapped flux on hydrides under pressure (Minkov et al. Nat. Phys. <b>19</b>, 1293 2023) are not consistent with what would be expected from a superconducting sample.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 2","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10948-025-06948-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688384","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":"Mean-Field Study of Magnetic Properties and Magnetocaloric Effect in Iron(III) Nitride-Based Antiperovskite Materials","authors":"M. Salama,&nbsp;H. Kerrai,&nbsp;H. Saadi,&nbsp;E. M. Jalal,&nbsp;N. Hachem,&nbsp;E. B. Choubabi,&nbsp;M. El Bouziani","doi":"10.1007/s10948-025-06957-0","DOIUrl":"10.1007/s10948-025-06957-0","url":null,"abstract":"<div><p>We investigated the magnetic, magnetocaloric, and hysteresis characteristics of the antiperovskite material Fe<span>(_{3})</span>ZnN by employing the mean-field approximation method. The findings indicate that magnetization gradually declines with rising temperature, whereas the application of an external magnetic field elevates the critical temperature <span>(T_{c})</span> by promoting greater alignment of the magnetic moments. A peak in the magnetic entropy change <span>(-Delta S_{m})</span>, at <span>(T_{c})</span>, indicating a significant magnetocaloric effect, ideal for magnetic refrigeration applications. Additionally, the relative cooling power (RCP) exhibits a linear increase with the strength of the magnetic field. The hysteresis analysis reveals a gradual decrease in coercivity and remanence with rising temperature, ultimately leading to the disappearance of the hysteresis loop above <span>(T_{c})</span>, signaling a transition to the paramagnetic phase. These findings suggest that the Fe<span>(_{3})</span>ZnN compound holds promise as a candidate material for magnetic refrigeration applications.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 2","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667987","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":"Pressure-Induced Flat Bands and Electride Behavior in SC Mg","authors":"Sabri F. Elatresh","doi":"10.1007/s10948-025-06947-2","DOIUrl":"10.1007/s10948-025-06947-2","url":null,"abstract":"<div><p>The high-pressure phase diagram of Magnesium (Mg) has attracted significant attention due to its relevance as a constituent of Earth’s inner core (IC), where it profoundly influences physical behavior and properties under extreme conditions. A recent study has revealed multiple crystal structure transitions in Mg, including the emergence of non-close-packed phases at extreme pressures. We investigate the electronic structure of simple cubic (SC) Mg under extreme pressure using Density Functional Theory (DFT) calculations. At 1320 GPa, our analysis shows that charge density accumulates at the center of the unit cell, increasing as pressure rises. The electron localization function (ELF) reveals that electrons are not just confined to atomic sites but also extend into interstitial regions, suggesting a shift in bonding character driven by <i>p</i>-<i>d</i>-orbital contributions. Additionally, the electronic band structure and density of states (DOS) confirm that Mg remains metallic at this pressure. A distinct flat band appears along the X-M path in the Brillouin zone, indicating enhanced electronic correlations that could influence the transport properties of Mg. These results highlight how extreme compression reshapes electronic interactions, potentially leading to novel high-pressure phenomena.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 2","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143632502","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":"Correlation Between Local Structure and Interlayer Coupling Through Fluctuations-Induced Conductivity in La0.7Sr0.3MnO3-Added (Bi, Pb)-2223 Superconductors","authors":"Muhammad A. Anugrah,&nbsp;Jun-Yung Oh,&nbsp;Rico P. Putra,&nbsp;Byeongwon Kang","doi":"10.1007/s10948-025-06956-1","DOIUrl":"10.1007/s10948-025-06956-1","url":null,"abstract":"<div><p>In this study, we investigated the relationship between excess conductivity and the local structure of Bi_1.6Pb_0.4Sr₂Ca₂Cu₃O_10+δ ((Bi, Pb)-2223) polycrystalline samples. A series of (Bi, Pb)-2223 + LSMO composites (0 – 1.5 wt%) were synthesized using the conventional solid-state reaction method. The critical temperature (<i>T</i>_<i>c</i>) determined from the temperature-dependent resistivity curves decreased with increasing LSMO content, from 106.65 K for the pure sample to 102.48 K to the 15 wt% sample, except for the 10 wt% sample, which exhibited a rise comparable to the pure sample. To elucidate the mechanisms affecting <i>T</i>_<i>c</i>, we applied the Aslamazov-Larkin (AL) and Lawrence-Doniach (LD) theories. We identified the Lawrence-Doniach temperature (<i>T</i>_<i>LD</i>) as the crossover point at which the system transitions from 2 to 3D fluctuations in the mean field region (MFR). Our calculations of excess conductivity within the MFR enabled us to quantify microscopic parameters such as the coherence length along the c-axis (<span>({xi }_{c})</span>), interlayer coupling strength (<span>(J)</span>), and interlayer coupling distance (<span>(d)</span>), revealing trends in <i>T</i>_<i>c</i> associated with LSMO addition in the (Bi, Pb)-2223 system. The local atomic structure of the CuO₂ plane was characterized using X-ray absorption fine structure measurements at the Cu K-edge. We observed contrasting behaviors between the Cu–O and Cu-Ca bonds, indicating weakened interaction between the CuO₂ superconducting layer and the space layer. Meanwhile, the Cu-Sr bond exhibited suppression or elongation due to LSMO addition. Notably, in the 10 wt% sample, the bond lengths from the absorbing atom were similar to those in the pure sample, suggesting an inhomogeneous distribution of LSMO in the samples. These findings indicate that local structural alterations due to LSMO addition decrease the carrier supply to the CuO₂ layers, thereby affecting the superconducting properties of the (Bi, Pb)-2223 system.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 2","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143632503","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}