Journal of Superconductivity and Novel Magnetism最新文献

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Effect of the Solidification Rate on the Magnetic and Magnetocaloric Properties of NiMnIn Heusler Alloy: Second-Order Magnetic Transition 凝固速率对NiMnIn Heusler合金磁性和磁热性能的影响:二阶磁转变
IF 1.6 4区 物理与天体物理
Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-17 DOI: 10.1007/s10948-024-06857-9
Milad Arman, Farzad Shahri, Reza Gholamipour, Sajad Sohrabi
{"title":"Effect of the Solidification Rate on the Magnetic and Magnetocaloric Properties of NiMnIn Heusler Alloy: Second-Order Magnetic Transition","authors":"Milad Arman,&nbsp;Farzad Shahri,&nbsp;Reza Gholamipour,&nbsp;Sajad Sohrabi","doi":"10.1007/s10948-024-06857-9","DOIUrl":"10.1007/s10948-024-06857-9","url":null,"abstract":"<div><p>This work attempted to study the effects of the solidification behavior on the magnetic and magnetocaloric properties of stoichiometric Ni<sub>50</sub>Mn<sub>34</sub>In<sub>16</sub> Heusler alloy. In this respect, the samples with two different diameters of 2 mm (D2 sample) and 8 mm (D8 sample) were prepared by suction casting technique. X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and magnetic force microscopy (MFM) were employed to identify the structure, microstructure, and magnetic domain distribution of the samples. Also, phase transformation behavior was characterized using differential scanning calorimetry (DSC) across a temperature range of 200–350 K. Thermo-magnetic properties of samples were evaluated using SQUID Quantum Design MPMS®3 during heating and cooling at the temperature range of 175–350 K at the constant magnetic field of 2 T. Moreover, the magnetic and magnetocaloric properties of the samples were analyzed using the cryostat-equipped VSM around the magnetic phase transition temperature under a magnetic field up to 1.75 T. Based on the results obtained, it is shown that an increase in the sample diameter leads to an increase in the Curie temperature. Furthermore, it was concluded that the magnetocaloric properties such as magnetic entropy change (<span>(Delta {S}_{text{M}})</span>), adiabatic temperature change (<span>(Delta {T}_{text{ad}})</span>), and refrigerant capacity (<span>(RC)</span>) parameters improved with an increase in the sample diameter through the microstructural refinement and enhancing the atomic ordering. Specifically, the maximum values of the <span>(Delta {S}_{text{M}})</span>, <span>(RC)</span>, and <span>(Delta {T}_{text{ad}})</span> for the D8 sample are estimated to be 3.04 J/kg K, 109.83 J/kg, and 0.94 K, respectively.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142845092","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
A New Methodology for the Development of Underwater Magnetic Pulse Wireless Communication 开发水下磁脉冲无线通信的新方法
IF 1.6 4区 物理与天体物理
Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-17 DOI: 10.1007/s10948-024-06870-y
Satya Narayana Murthy V
{"title":"A New Methodology for the Development of Underwater Magnetic Pulse Wireless Communication","authors":"Satya Narayana Murthy V","doi":"10.1007/s10948-024-06870-y","DOIUrl":"10.1007/s10948-024-06870-y","url":null,"abstract":"<div><p>Underwater wireless communication is an exciting and demanding technology, where communication for longer distances with less noise is essential. The widely used underwater communications, such as communication by acoustic waves, and terrestrial waves, such as optical and radiofrequency waves, have limitations. Communication by magnetic induction appears to be an alternative technique, which needs an improvement in long-distance communication. Storing the data digitally and sending the higher current pulses to the transmitter coil will generate stronger magnetic pulses. The digital magnetic pulses can transfer the data to longer distances, increasing the transfer rate.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826124","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
Physical Impacts of Magnetic Impurities in a Diamond-decorated System by Monte Carlo Simulations 磁性杂质在钻石装饰系统中的物理影响的蒙特卡罗模拟
IF 1.6 4区 物理与天体物理
Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-17 DOI: 10.1007/s10948-024-06853-z
A. Jabar, S. Idrissi, L. Bahmad
{"title":"Physical Impacts of Magnetic Impurities in a Diamond-decorated System by Monte Carlo Simulations","authors":"A. Jabar,&nbsp;S. Idrissi,&nbsp;L. Bahmad","doi":"10.1007/s10948-024-06853-z","DOIUrl":"10.1007/s10948-024-06853-z","url":null,"abstract":"<div><p>This paper studies the nano-diamond structure, commonly known as the ultra-dispersed diamond (UDD) structure. This diamond-decorated system is formed with the mixed spins S = 2 and σ = 3/2. This study uses the Monte Carlo simulations (MCS) under the Metropolis algorithm. We envisaged both the first nearest-neighbor interactions and the second nearest-neighbor interactions. For simplicity, we used the reduced crystal and external magnetic field. When fixing the other physical parameters, we inspected the temperature effect on the phase diagrams of the studied system. Also, we illustrated the thermal behavior of the magnetic entropy changes of the studied system for several reduced external magnetic field values. In addition, we presented the relative cooling power (RCP) as a function of the reduced external magnetic field of the (UDD) system. The effect of the reduced crystal field on the magnetizations of the diamond-decorated system has been investigated. To complete this study, we presented and discussed the magnetic hysteresis cycle of the studied diamond-decorated system.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844911","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
Study of Structural and Magnetic Properties of Pd-Doped Co4N Thin Films 掺钯Co4N薄膜的结构和磁性能研究
IF 1.6 4区 物理与天体物理
Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-17 DOI: 10.1007/s10948-024-06880-w
Akshaya A., Shailesh Kalal, K. Saravanan, Sunil Ojha, Jochen Stahn, Mukul Gupta
{"title":"Study of Structural and Magnetic Properties of Pd-Doped Co4N Thin Films","authors":"Akshaya A.,&nbsp;Shailesh Kalal,&nbsp;K. Saravanan,&nbsp;Sunil Ojha,&nbsp;Jochen Stahn,&nbsp;Mukul Gupta","doi":"10.1007/s10948-024-06880-w","DOIUrl":"10.1007/s10948-024-06880-w","url":null,"abstract":"<div><p>Tetra metal nitrides (M<sub>4</sub>N; M = Cr, Fe, Co, Mn, Ni) are a promising spintronic material with an anti-perovskite structure and fascinating magnetic characteristics due to a magneto-volume effect. Though a fully stochiometric Mn<sub>4</sub>N or Fe<sub>4</sub>N has been achieved, the lattice parameter (LP) of Co<sub>4</sub>N was always been found to be significantly lower than the anticipated theoretical values, indicating a sub-stochiometric Co<sub>4</sub>N phase. The formation enthalpy of Co<sub>4</sub>N is slightly positive resulting in unfavorable thermodynamical conditions and significant out-diffusion of N from Co<sub>4</sub>N. In this work, we present a comparative study of undoped and Pd-doped Co<sub>4</sub>N thin films synthesized using a reactive nitrogen sputtering. The structural, composition, and magnetic properties have been studied by combining x-ray diffraction, Rutherford backscattering, energy-dispersive x-ray spectroscopy, secondary ion mass spectroscopy, vibrating sample magnetometer, magneto-optical Kerr effect, and polarized neutron reflectivity measurements. It was found that Pd doping of about 5 at.% results in a significant enhancement in the LP of Co<sub>4</sub>N signifying a higher amount of N retention without adversely affecting the growth and magnetic properties. It is further suggested that the amount of Pd doping may further be increased to realize a fully stoichiometric Co<sub>4</sub>N.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826122","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
A Study of the Electromagnetic Absorption Properties of FeNi3@MnO2/FeNi3 关于 FeNi3@MnO2/FeNi3 电磁吸收特性的研究
IF 1.6 4区 物理与天体物理
Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-17 DOI: 10.1007/s10948-024-06861-z
Seyed Ebrahim Mousavi Ghahfarokhi, Fatemeh Hamalzadeh Ahmadi, Omid Khani
{"title":"A Study of the Electromagnetic Absorption Properties of FeNi3@MnO2/FeNi3","authors":"Seyed Ebrahim Mousavi Ghahfarokhi,&nbsp;Fatemeh Hamalzadeh Ahmadi,&nbsp;Omid Khani","doi":"10.1007/s10948-024-06861-z","DOIUrl":"10.1007/s10948-024-06861-z","url":null,"abstract":"<div><p>FeNi3@MnO<sub>2</sub>/FeNi<sub>3</sub> (FMF) nanocomposite with different weight ratios of FeNi<sub>3</sub> to FeNi<sub>3</sub>@MnO<sub>2</sub> was prepared under 100 ℃ for 3 h. Then, these compounds’ structural and microstructural properties were characterized using X-ray diffraction, field emission scanning electron microscopy, and transmission electron microscopy. Also, the electromagnetic properties of the samples were characterized using a vibrating sample magnetometer, and microwave absorption in the 2–18 GHz frequency range. The results show that the magnetic characteristics of the samples increased with the increase in the ratio of FeNi<sub>3</sub> nanoparticles. However, the excessive growth of FeNi<sub>3</sub> nanoparticles decreased the dielectric properties (the dielectric constant) so that the electrical conductivity of the FMF (4) sample is lower than the FMF (3) sample. The reflection loss of the FMF (1) sample was better than the other samples and about − 27 db.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826121","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
Eliashberg Analysis of Overdoped Bi(_2)Sr(_2)CaCu(_2)O(_{8+delta }) Intrinsic Tunneling Spectra 过掺Bi (_2) Sr (_2) CaCu (_2) O (_{8+delta })本征隧穿光谱的Eliashberg分析
IF 1.6 4区 物理与天体物理
Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-17 DOI: 10.1007/s10948-024-06840-4
Xiaohong Sui, Chengwei Dong, Huanbei Ren
{"title":"Eliashberg Analysis of Overdoped Bi(_2)Sr(_2)CaCu(_2)O(_{8+delta }) Intrinsic Tunneling Spectra","authors":"Xiaohong Sui,&nbsp;Chengwei Dong,&nbsp;Huanbei Ren","doi":"10.1007/s10948-024-06840-4","DOIUrl":"10.1007/s10948-024-06840-4","url":null,"abstract":"<div><p>Considering that Bi<span>(_2)</span>Sr<span>(_2)</span>CaCu<span>(_2)</span>O<span>(_{8+delta })</span> (Bi2212) intrinsic Josephson junctions have a body-centered tetragonal structure, and we adjusted a directional tunneling matrix element in the effective density of states. Using the <i>d</i>-wave Eliashberg equations, tunneling spectra of overdoped Bi2212 intrinsic Josephson junction are well reproduced in a wide temperature range below the critical temperature <span>(T_c)</span>. From which we obtained the pairing glue spectral function <span>(alpha ^2F(Omega ))</span>, which is composed of a low-energy resonance peak and a high-energy broad spectrum. These two parts have different effects on the tunneling spectra: the low-energy resonance peak controls the entire shape of the tunneling spectra, and the high-energy broad spectrum maintains a certain electron-boson coupling constant <span>(lambda )</span>. Some interesting and important rules in the fitting process are summarized. The dip of tunneling spectra gradually disappears with increasing temperature, which can be fitted using a simple Dynes’ form of density of states, where the energy gap is energy-independent. As the temperature rises to <span>(T_c)</span>, the main peak position of the density of states of the sample still remains a finite value, that is, the energy gap is not closed when the superconductivity disappears, which provides an angle to investigate the pseudogap phenomenon in high-<span>(T_c)</span> superconductors.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10948-024-06840-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Giant Magnetocaloric Effect and Magnetic Critical Behavior in Polycrystalline GdPO4 多晶 GdPO4 中的巨磁焦效应和磁临界行为
IF 1.6 4区 物理与天体物理
Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-16 DOI: 10.1007/s10948-024-06866-8
Jieyang Fang, Binlong Pan, Xiukun Hu, Nengjun Yu, Minxiang Pan, Hongliang Ge, Hangfu Yang, Qiong Wu
{"title":"Giant Magnetocaloric Effect and Magnetic Critical Behavior in Polycrystalline GdPO4","authors":"Jieyang Fang,&nbsp;Binlong Pan,&nbsp;Xiukun Hu,&nbsp;Nengjun Yu,&nbsp;Minxiang Pan,&nbsp;Hongliang Ge,&nbsp;Hangfu Yang,&nbsp;Qiong Wu","doi":"10.1007/s10948-024-06866-8","DOIUrl":"10.1007/s10948-024-06866-8","url":null,"abstract":"<div><p>Magnetocaloric effect (MCE) and critical behavior of polycrystalline GdPO<sub>4</sub> prepared by chemical precipitation and solid-state sintering method were investigated. X-ray diffraction (XRD) patterns indicate that GdPO<sub>4</sub> is crystalized in monazite phase with monoclinic crystal structure. Magnetization measurements confirm the presence of ferromagnetic-paramagnetic phase transition, as well as the presence of ferromagnetic and antiferromagnetic interactions between Gd<sup>3+</sup> ions in the low-temperature region. Arrott curves indicate that the sample exhibits second-order magnetic phase transition behavior. The maximum value of magnetic entropy change (−∆<i>S</i><sub>M</sub><sup>max</sup>) and relative cooling power (<i>RCP</i>) are 50.1 J/(kg·K) (11.3 J/(kg·K)) and 416.3 J/kg (56.4 J/kg) at 5 T (1 T) magnetic field, respectively. The maximum value of adiabatic temperature change (∆<i>T</i><sub>ad</sub><sup>max</sup>) reaches 36.5 K under an applied magnetic field of 5 T, indicating that GdPO<sub>4</sub> is a good candidate for low-temperature magnetic refrigeration. Critical behavior is analyzed and the existence of short-range ordering (SRO) magnetic exchange interactions in the long-range ordering (LRO) of GdPO<sub>4</sub> is suggested to be responsible for the large magnetocaloric effect.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826162","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
Emergence of Magnetic Anomaly and Development of Non-linear Susceptibility with Magnetic Field in ErVO4 ErVO4 中磁场异常的出现和非线性磁感应强度的发展
IF 1.6 4区 物理与天体物理
Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-16 DOI: 10.1007/s10948-024-06846-y
Dheeraj Ranaut, Koushik P., K. Mukherjee
{"title":"Emergence of Magnetic Anomaly and Development of Non-linear Susceptibility with Magnetic Field in ErVO4","authors":"Dheeraj Ranaut,&nbsp;Koushik P.,&nbsp;K. Mukherjee","doi":"10.1007/s10948-024-06846-y","DOIUrl":"10.1007/s10948-024-06846-y","url":null,"abstract":"<div><p>Novel phases in quantum materials arise when quantum fluctuations couple with frustration, geometries, and lattice dimensionalities. In continuation, frustrated magnetism combined with lattice degree of freedom, magnetoelastic coupling and magnetic anisotropy may result in exotic magnetic properties in a system. Here, we have studied a rare earth orthovanadate ErVO<sub>4</sub>, where the presence of magnetoelastic coupling along easy c-axis of magnetization results in the evolution of different magnetic phases. The second nearest neighbour Er spins in this compound form a corner-sharing tetrahedra and the spins lie along the easy c-axis, in contradiction to other members of RVO<sub>4</sub> (R = Rare-earth) family. Our DC field superimposed AC susceptibility and heat capacity measurements show the emergence of a magnetic anomaly which is believed to originate due to the presence of large magnetoelastic coupling along the c-axis. Further, above 10 kOe, a magnetic phase associated with positive fifth order susceptibility is observed. In this region, the Zeeman energy linked with magnetic anisotropy stabilizes the interactions among the higher order moments. This observation is further supported by a theoretical model.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826306","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
Estimation of the Penetration Depth and Study of the Magnetic Characteristics in Bi-Pb-Sr-Ca-Cu-O Superconductors by EPR Measurements EPR测量Bi-Pb-Sr-Ca-Cu-O超导体穿透深度估算及磁性研究
IF 1.6 4区 物理与天体物理
Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-16 DOI: 10.1007/s10948-024-06881-9
F. E. Sánchez-Zacate, S. N. Arellano-Ahumada, C. Mejía García, E. Díaz Valdés, D. Ramírez-Rosales
{"title":"Estimation of the Penetration Depth and Study of the Magnetic Characteristics in Bi-Pb-Sr-Ca-Cu-O Superconductors by EPR Measurements","authors":"F. E. Sánchez-Zacate,&nbsp;S. N. Arellano-Ahumada,&nbsp;C. Mejía García,&nbsp;E. Díaz Valdés,&nbsp;D. Ramírez-Rosales","doi":"10.1007/s10948-024-06881-9","DOIUrl":"10.1007/s10948-024-06881-9","url":null,"abstract":"<div><p>In this work, two polycrystalline samples were prepared using the solid-state reaction technique. The X-ray diffraction patterns revealed that the samples A and B are a mixture of the superconducting phases (Bi, Pb)-2212 (Bi<sub>1.6</sub>Pb<sub>0.4</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8</sub>) and (Bi, Pb)-2223 (Bi<sub>1.6</sub>Pb<sub>0.4</sub>Sr<sub>2</sub>Ca<sub>2</sub>Cu<sub>3</sub>O<sub>10</sub>). The <span>(T_c)</span> was measured using electron paramagnetic resonance (EPR) in absorption mode: 97 K for the sample A and 101 K for sample B. The EPR spectra were measured (derivative of the absorption) and showed a signal in the low-field region only present in the superconducting state. The study of this signal revealed the coexistence of antiferromagnetism and diamagnetism in the sample A, for <span>(T &lt; T_{c})</span>. The same was observed in sample B after a light grinding. The effective penetration depth was estimated from the peak-to-peak linewidth of the EPR signal (at <i>T</i> = 92 K): <span>(lambda )</span>(92 K) = 479 nm for sample A, and 440 nm for sample B. These results are in agreement with the values obtained using techniques such as <span>(mu )</span>-spin rotation and magnetization measurements. With the aid of the two-fluid model and the BCS approximation <span>(lambda )</span> was also estimated at 0 K. Using these values and the Ginzburg-Landau theory, the lower critical field was calculated at <i>T</i> = 92 K and 0 K.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826305","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
The Transport AC Losses of YGdBCO-coated Conductors with Periodic Micro-Hole Arrays 具有周期性微孔阵列的 YGdBCO 涂层导体的传输交流损耗
IF 1.6 4区 物理与天体物理
Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-16 DOI: 10.1007/s10948-024-06874-8
Mingjiang Wang, Jiangtao Shi, Lihua Jin, Qingyang Wang, Yong Zhao
{"title":"The Transport AC Losses of YGdBCO-coated Conductors with Periodic Micro-Hole Arrays","authors":"Mingjiang Wang,&nbsp;Jiangtao Shi,&nbsp;Lihua Jin,&nbsp;Qingyang Wang,&nbsp;Yong Zhao","doi":"10.1007/s10948-024-06874-8","DOIUrl":"10.1007/s10948-024-06874-8","url":null,"abstract":"<div><p>The critical current density (<b><i>J</i></b><sub><i>c</i></sub>) of Y<sub>0.5</sub>Gd<sub>0.5</sub>Ba<sub>2</sub>Cu<sub>3</sub>O<sub>7-x</sub> (YGdBCO)-coated conductors (CCs) could be improved via producing the periodic micro-hole arrays on the surface of CCs. In this work, the influence of micro-hole arrays on the transport AC losses of YGdBCO CCs was studied. The micro-hole arrays were produced in YGdBCO CCs via laser drilling, which were distributed with different spacings (<i>l</i>) between two neighboring micro-holes along longitudinal and transverse directions. With <i>l</i> ≥ 0.7 × 0.7 mm, the critical current (<b><i>I</i></b><sub><i>c</i></sub>) values of drilled samples were nearly identical with that of virgin one. However, a considerable nonlinear decrease of <b><i>I</i></b><sub><i>c</i></sub> value was displayed in the drilled samples with <i>l</i> &lt; 0.7 × 0.7 mm. In addition, compared to the virgin one, the AC losses of samples drilled with various transverse and longitudinal spacings were increased more than one order of magnitude under low frequency (31 Hz ~ 177 Hz). There was almost no effect on the AC losses of micro-holes spacing for drilled CCs. A 3D <i>H</i>-formulation simulation model was established to analyze the experimental results. The investigations revealed the magnetic flux densities around micro-holes were altered, which could potentially lead to an increase of AC loss.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826304","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
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