Article
Physics, Applied
Y. Takeda, G. Nishijima, U. Nakai, T. Motoki, J. Shimoyama, H. Kitaguchi
Summary: This study systematically evaluates the angular dependence of resistance and critical current of a Bi-2223 superconducting joint in a closed-loop sample using a joint resistance evaluation system. The results show that the resistance and critical current of the joint depend on the angle of the magnetic field, and exhibit different characteristics in different angle ranges.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
A. Stangl, A. Palau, G. Deutscher, X. Obradors, T. Puig
Summary: The functional properties of cuprates are strongly influenced by oxygen doping, as demonstrated in this study of YBCO thin films. The relation between charge carrier density, hole doping, and critical current density was explored, revealing a significant increase of Jc with nH. Overdoping in YBCO was found to enhance current carrying capabilities through the reconstruction of the Fermi surface at the Quantum Critical Point (QCP).
SCIENTIFIC REPORTS
(2021)
Article
Physics, Applied
J. Jaroszynski, A-M Constantinescu, G. Miller, A. Xu, A. Francis, T. Murphy, D. C. Larbalestier
Summary: Detailed knowledge of the full angular and wide temperature range characterization of the critical current I-c of REBCO coated conductors (CC) is crucial for the design of REBCO-based magnets. However, obtaining such data is expensive and difficult using traditional methods. This study presents J(c)(B,T,theta) results for a set of CC samples, highlighting the importance of considering the diverse properties of the samples when designing magnets.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Masashi Miura, Go Tsuchiya, Takumu Harada, Keita Sakuma, Hodaka Kurokawa, Naoto Sekiya, Yasuyuki Kato, Ryuji Yoshida, Takeharu Kato, Koichi Nakaoka, Teruo Izumi, Fuyuki Nabeshima, Atsutaka Maeda, Tatsumori Okada, Satoshi Awaji, Leonardo Civale, Boris Maiorov
Summary: The addition of artificial pinning centers has greatly increased the critical current density of superconductors, allowing for breakthroughs in all-superconducting magnets and other applications. By modifying certain parameters such as carrier density and chemical pressure, the critical current density can be further enhanced.
NPG ASIA MATERIALS
(2022)
Article
Computer Science, Interdisciplinary Applications
Kyungsik Seo, Seungyong Hahn, Il Han Park
Summary: A sensitivity analysis-based topology optimization method is proposed for designing superconducting systems operating under critical current densities. The method achieves topology changes in the superconducting materials by creating air holes and superconducting dots. The positions of these features are determined through hole and dot sensitivity analyses. The method allows for fast convergence and high-quality optimal solutions.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2023)
Article
Engineering, Electrical & Electronic
H. Yu, J. Lu, J. D. Weiss, D. C. van der Laan
Summary: This experimental work presents the critical current measurements of two different REBCO cables using a test facility at NHMFL. The critical currents were determined by measuring the voltage-current traces at 4.2 K. The results have significant implications for the development and application of REBCO cables.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2022)
Article
Chemistry, Multidisciplinary
Mirko Rocci, Dhavala Suri, Akashdeep Kamra, Gilvania Vilela, Yota Takamura, Norbert M. Nemes, Jose L. Martinez, Mar Garcia Hernandez, Jagadeesh S. Moodera
Summary: This study demonstrates an enhancement of up to 30% in critical current in NbN micro- and nano superconducting bridges through the proposed mechanism of surface nucleation and pinning of Abrikosov vortices. The work also shows an infinite electroresistance and hysteretic resistance dependent on an applied electric field, indicating a potential for field-driven enhancement in superconducting properties and its application in low-dissipation digital computing.
Article
Materials Science, Multidisciplinary
J. Lim, S. Sinha, A. C. Hire, J. S. Kim, P. M. Dee, R. S. Kumar, D. Popov, R. J. Hemley, R. G. Hennig, P. J. Hirschfeld, G. R. Stewart, J. J. Hamlin
Summary: A recent study has found that Nb substitution in MoB2 significantly suppresses the superconducting critical temperature under high pressure. The observed suppression may result from reduced electron-phonon coupling, as well as enhanced inhomogeneity and spin fluctuations in Nb0.25Mo0.75B2.
Article
Materials Science, Multidisciplinary
Carles Navau, Stefan Minniberger, Michael Trupke, Alvaro Sanchez
Summary: Replacing solid geometries with superconducting rings in levitation brings two important advantages: comparable forces but greatly reduced mass, resulting in increased trap frequency, and the additional control provided by the flux trapped in the ring by in-field cooling. However, stability in lateral and rotational directions is not guaranteed for this idealized geometry. Discussions on the requirements for achieving stability in all degrees of freedom in simple superconducting structures are provided.
Article
Materials Science, Multidisciplinary
Daxing Huang, Hongjing Shang, Taiguang Li, Bowei Xie, Qi Zou, Hongwei Gu, Zhifeng Ren, Fazhu Ding
Summary: This study presents a novel method to fabricate a superconducting joining between YBCO coated conductors with large current capacities, achieving more than 90% retention of critical current. The use of an Ag layer in the joining strap promotes the recovery of superconductivity during oxygenation annealing, resulting in superior superconducting performance through optimized atomic alignment at the joined YBCO interface.
MATERIALS TODAY PHYSICS
(2021)
Article
Physics, Applied
Zhanguo Zong, Hirotaka Shimizu
Summary: This article introduces a CCCL method for cooling superconducting magnets and presents the optimal design solution and its relationship with material properties through theoretical analysis and numerical simulation.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Sylwia Hajdasz, Adam Kempski, Krzysztof Solak, Maciej Marc, Jacek Rusinski, Pawel Szczesniak
Summary: Superconducting fault current limiters (SFCL) using high-temperature superconducting tapes of the second generation (HTS 2G) can replace traditional devices in power systems to limit short-circuit currents. The critical current of the HTS tape determines the activation of the SFCL and should remain constant to ensure proper cooperation with power system protection devices. The article presents research results on the degradation processes of 2G HTS tapes due to prospective short-circuit currents exceeding the critical current, including the decrease in critical current value and determination of limitation values of voltage drop that do not cause accelerated degradation processes.
APPLIED SCIENCES-BASEL
(2023)
Article
Physics, Applied
Junjie Du, Wei Wu, Xi Wu, Guoshu Zhang, Yujie Zhao, Mingming Xiao
Summary: Based on the critical state model, this study simulates the magnetization curve of a single superconducting wire and the variation of higher-order magnetic field components with current for a 7 T highly homogeneous magnet. The results are validated through magnetization curve measurement and cool-down test on the superconducting magnet, demonstrating the effectiveness of this methodology.
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
(2022)
Article
Physics, Multidisciplinary
A. Blair, D. P. Hampshire
Summary: The study investigates the critical current density J(c)(B) in superconducting-normal-superconducting (SNS) Josephson junctions and polycrystalline superconducting systems with grain boundaries modeled as Josephson-type planar defects. Analytical expressions and computational simulations are used to analyze J(c)(B) in various dimensions and provide insights into the high-field behavior of current densities in different superconductors.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Physics, Applied
Dhavala Suri, Akashdeep Kamra, Thomas N. G. Meier, Matthias Kronseder, Wolfgang Belzig, Christian H. Back, Christoph Strunk
Summary: Non-reciprocity in the critical current, known as the superconducting diode effect, has been observed in NbN micro-bridges and NbN/magnetic insulator hybrids. The origin of this effect is related to the symmetry breaking mechanisms. The diode effect disappears when the magnetic field is parallel to the sample plane. The rectification is observed at temperatures up to 10 K, expanding the potential applications of this device.
APPLIED PHYSICS LETTERS
(2022)
Article
Instruments & Instrumentation
Jungbae Bahng, Jonggi Hong, Jin Yong Park, Seong Jun Kim, Jung -Woo Ok, Seyong Choi, Chang Seouk Shin, Jang-Hee Yoon, Mi-Sook Won, Byoung-Seob Lee, Eun-San Kim
REVIEW OF SCIENTIFIC INSTRUMENTS
(2016)
Article
Physics, Applied
Dipak Patel, Md Shahriar Al Hossain, Khay Wai See, Wenbin Qiu, Hiroki Kobayashi, Zongqing Ma, Seong Jun Kim, Jonggi Hong, Jin Yong Park, Seyong Choi, Minoru Maeda, Mohammed Shahabuddin, Matt Rindfleisch, Mike Tomsic, Shi Xue Dou, Jung Ho Kim
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2016)
Article
Physics, Applied
Dipak Patel, Md Shahriar Al Hossain, Minoru Maeda, Mohammed Shahabuddin, Ekrem Yanmaz, Subrata Pradhan, Mike Tomsic, Seyong Choi, Jung Ho Kim
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2016)
Article
Materials Science, Multidisciplinary
Se-Hee Lee, Seyong Choi
Article
Engineering, Electrical & Electronic
Su-Hun Kim, Se-Hee Lee, Dipak Patel, Seyong Choi
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2018)
Article
Physics, Applied
Jun Hyuk Choi, Dong Gun Lee, Ju Heum Jeon, Ee Joo Lee, Minoru Maeda, Seyong Choi
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2019)
Article
Physics, Applied
Dipak Patel, Wenbin Qiu, Mislav Mustapic, Jonathan C. Knott, Zongqing Ma, Daniel Gajda, Mohammed Shahabuddin, Jianyi Xu, Seyong Choi, Mike Tomsic, Shi Xue Dou, Yusuke Yamauchi, Jung Ho Kim, Md Shahriar Al Hossain
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2018)
Article
Multidisciplinary Sciences
Dipak Patel, Md Shahriar Al Hossain, Wenbin Qiu, Hyunseock Jie, Yusuke Yamauchi, Minoru Maeda, Mike Tomsic, Seyong Choi, Jung Ho Kim
SCIENTIFIC REPORTS
(2017)
Article
Physics, Multidisciplinary
Seong Jun Kim, Jin Yong Park, Byoung-Seob Lee, Jonggi Hong, Mi-Sook Won, Jung-Woo Ok, Seyong Choi
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
(2018)
Article
Chemistry, Physical
Minoru Maeda, Seyong Choi
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Multidisciplinary Sciences
Dipak Patel, Su-Hun Kim, Wenbin Qiu, Minoru Maeda, Akiyoshi Matsumoto, Gen Nishijima, Hiroaki Kumakura, Seyong Choi, Jung Ho Kim
SCIENTIFIC REPORTS
(2019)
Article
Nanoscience & Nanotechnology
Dipak Patel, Akiyoshi Matsumoto, Hiroaki Kumakura, Gen Nishijima, Minoru Maeda, Su-Hun Kim, Seyong Choi, Jung Ho Kim
SCRIPTA MATERIALIA
(2020)
Article
Physics, Applied
Su-Hun Kim, Dipak Patel, Minoru Maeda, Minhee Kim, Se-Hee Lee, Seyong Choi, Jung Ho Kim
Summary: The research focuses on improving the interconnection between multifilamentary wires in MgB2 magnets through a unique superconducting joint technique, resulting in high critical current and potential application in magnetic resonance imaging systems.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2021)
Article
Computer Science, Information Systems
Su-Hun Kim, Dipak Patel, Yeundae Jeong, Minhee Kim, Se-Hee Lee, Jung Ho Kim, Seyong Choi
Summary: In this study, a 7 T superconducting magnet capable of persistent-mode operation was designed, fabricated, and evaluated. The magnet showed promising results in terms of magnetic field uniformity and electron beam compression, confirming its suitability for cryogenic electron beam ion sources.
Article
Materials Science, Multidisciplinary
Dipak Patel, Akiyoshi Matsumoto, Hiroaki Kumakura, Minoru Maeda, Su-Hun Kim, Md Shahriar Al Hossain, Seyong Choi, Jung Ho Kim
JOURNAL OF MATERIALS CHEMISTRY C
(2020)