Article
Materials Science, Ceramics
Ana Harabor, Petre Rotaru, Novac Adrian Harabor, Petr Nozar, Andrei Rotaru
Summary: A composite material with superconducting properties was obtained by sintering YBa2Cu3O7-x doped with Ag2O at 960 degrees C and employing a special cooling program. XRD and SEM analysis confirmed the preferential orientation of YBa2Cu3O7-x crystallites. The dimensions of YBCO-123 crystallites were found to be dependent on Ag content. TGA showed that total mass loss during heating was influenced by Ag content.
CERAMICS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Miranda L. Vinay, Jay C. LeFebvre, Han Cai, Joseph Forman, Shane Cybart
Summary: Research showed that using a 1% bromine-ethanol etchant solution to etch YBCO thin films resulted in changes in electrical properties, but the impact was minimal.
ACS APPLIED NANO MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Miranda L. Vinay, Jay C. LeFebvre, Han Cai, Joseph Forman, Shane Cybart
Summary: The study found that bromination of YBCO results in changes in surface morphology and composition, but has minimal impact on electrical properties, only causing slight electrical adjustments.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Yakir Dahan, Eldad Holdengreber, Elichai Glassner, Oz Sorkin, Shmuel E. Schacham, Eliyahu Farber
Summary: A new technique for measuring electrical parameters of superconducting thin films at Very High Frequency (VHF) range was proposed, utilizing microstrip resonators. Through theoretical analysis and simulations, an optimal resonator design was achieved for accurate measurements within the VHF range. Experimental results showed that the quality factor and attenuation of the YBCO resonator were significantly better than those of a copper resonator.
Article
Physics, Applied
Laura Gozzelino, Michela Fracasso, Mykola Solovyov, Fedor Gomory, Andrea Napolitano, Roberto Gerbaldo, Gianluca Ghigo, Francesco Laviano, Daniele Torsello, Mihai A. Grigoroscuta, Gheorghe Aldica, Mihail Burdusel, Petre Badica
Summary: The addition of a ferromagnetic layer can significantly enhance the shielding ability of superconducting screens, especially in the transverse field direction. This method can increase the shielding factor by up to 8 times, reaching values of 10(2) or higher in the inner half of the shield. Similarly, in the axial field direction, the addition of ferromagnetic material can slightly decrease the shielding performance, but can widen the range of applied fields where high shielding factors occur near the close extremity of the shield.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Pawel Peczkowski, Piotr Zachariasz, Marcin Kowalik, Waldemar Tokarz, Sugali Pavan Kumar Naik, Jan Zukrowski, Cezariusz Jastrzebski, Longji Joseph Dadiel, Wojciech Tabis, Lukasz Gondek
Summary: The diffusion of iron into the YBCO matrix is crucial for multilayer systems with YBCO/Fe interfaces. As the Fe content increases, the formation of BaFeO3-delta and iron oxides is observed, leading to a significant suppression of superconductivity in YBCO materials containing more than 7 wt% Fe.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Computer Science, Information Systems
Alfredo Alvarez, Belen Rivera, Belen Perez, Pilar Suarez
Summary: This study proposes using HTS tape to replace the previously used BSCO bulk superconducting screens in the design of an IR-SFCL. A preliminary study of tape screens with different configurations was conducted, and the solenoidal configuration was determined to be the most suitable. Testing of solenoid screens with different layers showed good shielding factor.
Article
Thermodynamics
S. G. Castillo-Lopez, C. Villarreal, R. Esquivel-Sirvent, G. Pirruccio
Summary: This theoretical study focuses on the near-field radiative heat transfer between high-T-c superconducting thin films, showing that thin films enhance heat transfer significantly compared to bulk plates. The optical response above and below T-c plays a crucial role, with the superconducting phase transition leading to a suppression of total heat flux.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Chemistry, Physical
Ilya A. Shipulin, Aleena Anna Thomas, Sigrid Holleis, Michael Eisterer, Kornelius Nielsch, Ruben Huehne
Summary: In this study, we investigated the local structure and superconducting properties of Ag-doped YBCO films and analyzed the effect of silver doping on their transport characteristics. The results showed that the performance of the doped films varied depending on the substrate, with the 5%Ag-doped YBCO films on STO substrates exhibiting the greatest improvement.
Article
Physics, Applied
Bakhrom Oripov, Dinesh Kumar, Cougar Garcia, Patrick Hemmer, T. Venkatesan, M. S. Ramachandra Rao, Steven M. Anlage
Summary: Boron-doped diamond granular thin films are found to exhibit superconductivity with an optimal critical temperature of T-c = 7.2 K. The in-plane complex surface impedance of these films in the microwave frequency range was measured using a resonant technique, showing potential applications in high kinetic inductance devices such as microwave kinetic inductance detectors and quantum impedance devices. The experimental results suggest that the magnetic penetration depth temperature dependence is consistent with that of a fully gapped s-wave superconductor.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
An-Lei Zhang, Wan-Yan Jiang, Xing-Hong Chen, Xiao-Ke Zhang, Wen-Lai Lu, Fei Chen, Zhen-Jie Feng, Shi-Xun Cao, Jin-Cang Zhang, Jun-Yi Ge
Summary: In granular superconductors, grain boundaries are closely related to vortex dynamics and macroscopic superconducting properties. The research found that as the grain size decreases, anomalous magnetization jumps and flux avalanche occur, both originating from the same region of the H-T phase diagram. Further theoretical analysis reveals the effect of grain size on the pinning mechanism.
CURRENT APPLIED PHYSICS
(2022)
Review
Physics, Applied
Kazumasa Iida, Jens Hanisch, Satoshi Hata, Akiyasu Yamamoto
Summary: Since the discovery of Fe-based superconductors, efforts have been made to grow single crystals and epitaxial thin films of them for both fundamental studies and applied research. Remarkably, most Fe-based superconductors have been successfully realized in the form of epitaxial thin films. However, due to various challenges, some compounds could only be obtained as single crystals. In recent years, these issues have been solved, and those compounds have been successfully fabricated as epitaxial thin films, allowing for easier evaluation of their application potential through transport critical current measurements.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Review
Chemistry, Multidisciplinary
Zhi Li, Lina Sang, Peng Liu, Zengji Yue, Michael S. Fuhrer, Qikun Xue, Xiaolin Wang
Summary: Recent research has extensively focused on atomically thin superconductors, particularly driven by the discovery of high-temperature superconductivity in single-layer FeSe films grown on SrTiO3 substrates in 2012. These studies challenge the current understanding of the superconducting mechanism of unconventional superconductors and suggest new directions for achieving high-transition-temperature superconductors.
Article
Materials Science, Multidisciplinary
Haixing Cao, Xianming Ren, Meibing Ma, Xin Yin, Yemei Han, Kai Hu, Zheng Sun, Fang Wang, Kailiang Zhang
Summary: The study presented a single-phase multiferroic spinel CoFe1.6Al0.4O4 with ferrimagnetic and ferroelectric properties at room temperature. The CoFe1.6Al0.4O4 films exhibit a spinel structure with Fd (3) over bar m space group, showing typical ferroelectric hysteresis and significant piezoresponse displacement at room temperature. The ferroelectric order likely originates from possible atomic orderings in cationic sublattices and local deformation induced by the substitution of Al ions at the sublattices of CoFe2O4 in the CoFe1.6Al0.4O4 spinel.
Article
Physics, Multidisciplinary
Suman Kumari, Mohd Anas, D. S. Raghav, Shital Chauhan, P. K. Siwach, Vivek Malik, H. K. Singh
Summary: We present a detailed study on the magnetotransport behavior of YBCO-SSMO superconducting-ferromagnetic composite thin films. The results show that the incorporation of ferromagnetic phase leads to a decrease in the critical temperature of the superconducting phase, a decrease in the slope of the normal state resistance-temperature curves, a decrease in the upper critical field and irreversibility field, and a reduction in hysteresis in the current-voltage characteristics.
Article
Materials Science, Ceramics
J-F Fagnard, C. Gajdowski, L. Boilet, F. Henrotte, C. Geuzaine, B. Vertruyen, P. Vanderbemden
Summary: The in-situ phase resolved partial discharge technique is suitable for assessing the quality of the contact between Pt electrodes and uncoated 3YSZ samples. A sudden increase in partial discharge current before any change in the 50 Hz current curve is found to be a sign of defective electrical contact. Changes in the surface microstructure of samples due to partial discharges are observed.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Review
Physics, Applied
Devendra K. Namburi, Yunhua Shi, David A. Cardwell
Summary: The development of (RE)BCO cuprate HTS towards sustainable engineering and technological applications has steadily progressed since 1986, primarily due to their ability to trap large magnetic fields at accessible temperatures. The current state-of-the-art processing of (RE)BCO bulk superconductors for high-field applications is reviewed, focusing on optimized critical processing parameters and recent advances in processing techniques such as the integration of buffer techniques and nano-size stable phases. Applications and prospects for the future utilization of these materials, particularly in medical and pharma-industries, are also briefly discussed.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Kai Yuan Huang, Tomas Hlasek, Devendra Kumar Namburi, Anthony R. Dennis, Yunhua Shi, Mark D. Ainslie, Jasmin V. J. Congreve, Vladimir Plechacek, Jan Plechacek, David A. Cardwell, John H. Durrell
Summary: The use of thin-wall geometry can significantly improve the mechanical properties of high-temperature superconductors, allowing them to withstand higher electromagnetic stresses.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Instruments & Instrumentation
Clara Pereira Sanchez, Maxime Houbben, Jean-Francois Fagnard, Philippe Laurent, Christine Jerome, Ludovic Noels, Philippe Vanderbemden
Summary: This study investigates the Joule resistive heating phenomenon of electroactive shape memory composites when an electric current is injected at constant power. The research provides detailed analysis and numerical modeling to understand the resistive heating of the composites and identifies the parameters that are crucial in predicting the temperature rise. The findings also highlight the importance of considering external objects during the shape memory cycle for accurate resistive heating prediction.
SMART MATERIALS AND STRUCTURES
(2022)
Article
Physics, Applied
M. Houbart, J-F Fagnard, J. Dular, A. R. Dennis, D. K. Namburi, J. H. Durrell, C. Geuzaine, B. Vanderheyden, P. Vanderbemden
Summary: This study experimentally investigates the assembly of large grain melt-textured superconductors with orthogonal c-axes to form a Halbach array structure. The experimental distribution of magnetic flux density above the array is compared to a similar array made of permanent magnets, and a simple analytical model is developed to accurately reproduce the main experimental observations. The results show that lowering the distance between the superconductors causes a redistribution of current and affects the magnetic flux density distribution.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Instruments & Instrumentation
Clara Pereira Sanchez, Maxime Houbben, Jean-Francois Fagnard, Pascal Harmeling, Christine Jerome, Ludovic Noels, Philippe Vanderbemden
Summary: This study investigates the electro-thermo-mechanical properties of a shape memory composite (SMC) during shape memory cycles that use resistive heating. The study finds that resistive heating is crucial for achieving the desired shape change, and the electrical properties of the SMC have a significant impact on its mechanical behavior.
SMART MATERIALS AND STRUCTURES
(2022)
Article
Engineering, Electrical & Electronic
Sebastien Brialmont, Jean-Francois Fagnard, Benoit Vanderheyden, Frederic Mazaleyrat, Seungyong Hahn, Anup Patel, Philippe Vanderbemden
Summary: In this study, the ac magnetic hysteresis loops of a Ni-5at.%W alloy ferromagnetic substrate in second-generation YBCO tapes were measured. The peak intensity of the relative permeability was found to be unaffected by temperature, while the coercive field showed temperature dependence. Hysteresis losses exhibited power law behavior with respect to the amplitude of the flux density, and this behavior was also studied at low fields. The Jiles-Atherton model was able to accurately reproduce the hysteresis loops and estimate the temperature dependence of the hysteresis parameters.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2022)
Review
Chemistry, Multidisciplinary
Clara Pereira Sanchez, Christine Jerome, Ludovic Noels, Philippe Vanderbemden
Summary: This review discusses the state of the art on electroactive and magnetoactive shape memory polymer nanocomposites, and summarizes their applications in various fields. Special attention is given to the shape memory characteristics and the electric and magnetic fields required for activation.
Article
Polymer Science
Maxime Houbben, Clara Pereira Sanchez, Philippe Vanderbemden, Ludovic Noels, Christine Jerome
Summary: Electrically triggered shape memory polymers have been proven efficient and are seen as promising structural materials for high-end applications. Particularly, poly(epsilon-caprolactone) covalent adaptable networks (PCL-CAN) stand out due to their excellent shape memory properties and network reconfiguration, enabling the design of self-actuated devices with complex shapes. This study investigates the preparation of conducting PCL-CAN networks by blending multi-walled carbon nanotubes with four-arm star-shaped PCL. The composite showcases enhanced mechanical properties and excellent shape memory properties, making it suitable for self-folding multi-material design.
Article
Physics, Applied
Sebastien Brialmont, Julien Dular, Laurent Wera, Jean-Francois Fagnard, Benoit Vanderheyden, Christophe Geuzaine, Seungyong Hahn, Anup Patel, Philippe Vanderbemden
Summary: In this study, we demonstrated the magnetic shielding ability of a stack of YBa2Cu3O7 tape annuli. The annuli were cut from a second generation coated conductor deposited on a Ni-5at.%W alloy ferromagnetic substrate. The experiments showed that the stack of annuli could effectively shield both axial and transverse magnetic fields, and the presence of the ferromagnetic substrates played an important role in the shielding mechanism.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Applied
N. Tutt, J. Congreve, Y. Shi, D. Namburi, A. Dennis, H. Druiff, J. Durrell
Summary: This study presents a technique of fabricating superconducting joints between GdBCO-Ag bulk superconductors using YBCO-Ag as an intermediate joining material. The joints provide reliable connections between multiple bulk superconductors, addressing the challenges in fabricating large superconductors or shaping hard and brittle ones. The experiment joined nine single grains of GdBCO-Ag with a YBCO-Ag intermediate and investigated the effect of different orientations on the superconducting properties of jointed samples. The results showed that the jointing process led to degradation of critical temperature and critical current, as well as inhibited current flow due to silver diffusion and formation of large pores at the joint interface.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Thermodynamics
N. Rotheudt, J. -F. Fagnard, P. Harmeling, P. Vanderbemden
Summary: In this study, a device capable of measuring flux density at cryogenic temperature was designed and constructed. By utilizing a commercially available, inexpensive, room-temperature 3-axis Hall sensor and controlling the internal temperature at a constant 25°C, this device overcame the challenge of measuring at low temperature. The device demonstrated the ability to measure magnetic field strength down to 0.16 mT.
Article
Physics, Applied
Jean-Francois Fagnard, Laurent Boilet, Jean-Pierre Erauw, Francois Henrotte, Christophe Geuzaine, Benedicte Vertruyen, Philippe Vanderbemden
Summary: This study investigates the influence of humidity on the high voltage behaviour of zinc oxide porous pellets at room temperature using the PRPD method. The experiments showed that the maximum amplitude of PDs decreased while their number increased as the RH increased. Different characteristics in the PD pattern evolution with increasing AC voltage could be attributed to various locations between the electrodes.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Physics, Applied
M. Houbart, J-f Fagnard, J. Dular, A. R. Dennis, D. K. Namburi, J. H. Durrell, C. Geuzaine, B. Vanderheyden, P. Vanderbemden
Summary: Assembling trapped-field superconducting magnets in a Halbach array configuration can generate high magnetic fields and large field gradients. However, the reorganization of supercurrent loops during the assembly process limits the field generated by the system. Two methods, using stacked tapes instead of bulk superconductors and a re-magnetizing procedure, are proposed to reduce this demagnetization effect and increase the maximum field generated by the array.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
