951 citations · 7.1k across the 65 of their papers we have counts for
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Critical Current Distributions of Recent Bi-2212 Round Wires
Shaon Barua, Daniel S. Davis, Yavuz Oz +4
Bi-2212 is the only high-field, high-temperature superconductor (HTS) capable of reaching a critical current density (16 T, 4.2 K) of 6500 i…
The Conundrum of Strongly Coupled Supercurrent Flow in Both Under- and Over-doped Bi-2212 Round Wires
Yavuz Oz, Jianyi Jiang, Maxime Matras +4
Understanding what makes BiSrCaCuO (Bi-2212) the only high critical current density (), high temperature superconductor (HTS) capable of being made as a ro…
Ta, Ti and Hf effects on NbSn high-field performance: temperature-dependent dopant occupancy and failure of Kramer extrapolation
Chiara Tarantini, Shreyas Balachandran, Steve M Heald +5
The increasing demand for improving the high-field (16-22 T) performance of NbSn conductors requires a better understanding of the properties of modern wires much closer to irr…
Beneficial influence of Hf and Zr additions to Nb4at.%Ta on the vortex pinning of NbSn with and without an O source
Shreyas Balachandran, Chiara Tarantini, Peter J. Lee +5
Here we show that addition of Hf to Nb4Ta can significantly improve the high field performance of NbSn, making it suitable for dipole magnets for Future Circular Collider (FC…
Stable, predictable and training-free operation of superconducting Bi-2212 Rutherford cable racetrack coils at the very high wire current density of more than 1000 A/mm2
Tengming Shen, Ernesto Bosque, Daniel Davis +14
High-temperature superconductors (HTS) could enable high-field magnets much stronger than is possible with Nb-Ti and Nb3Sn, but two key limiting factors have so far been the diffic…
Evidence from EXAFS for Different Ta/Ti Site Occupancy in High Critical Current Density NbSn Superconductor Wires
Steve M. Heald, Chiara Tarantini, Peter J. Lee +4
To meet critical current density, J, targets for the Future Circular Collider (FCC), the planned replacement for the Large Hadron Collider (LHC), the high field performance of…
Effect of -particle irradiation on a NdFeAs(O,F) thin film
C. Tarantini, K. Iida, N. Sumiya +6
The effect of -particle irradiation on a NdFeAs(O,F) thin film has been investigated to determine how the introduction of defects affects basic superconducting properties, inclu…
Intrinsic and extrinsic pinning in NdFeAs(O,F): vortex trapping and lock-in by the layered structure
C. Tarantini, K. Iida, J. Haenisch +10
The Fe-based superconductors (FBS) present a large variety of compounds whose properties are affected to different extents by their crystal structures. Amongst them, the F…
Demonstration of an iron-pnictide bulk superconducting magnet capable of trapping over 1 T
J. D. Weiss, A. Yamamoto, A. A. Polyanskii +3
A trapped field of over 1 T at 5 K and 0.5 T at 20 K has been measured between a stack of magnetized cylinders of bulk polycrystalline Ba0.6K0.4Fe2As2 superconductors 10 mm in diam…
Significant enhancement of compositional and superconducting homogeneity in Ti rather than Ta-doped Nb3Sn
C. Tarantini, Z. H. Sung, P. J. Lee +2
Nb3Sn wires are now very close to their final optimization but despite its classical nature, detailed understanding of the role of Ta and Ti doping in the A15 is not fully understo…
Study of grain boundary transparency in (Yb1-xCax)Ba2Cu3O bi-crystal thin films over a wide temperature, field and field orientation range
Pei Li, Dmytro Abraimov, Anatolii Polyanskii +2
The residual low angle grain boundary (GB) network is still the most important current-limiting mechanism operating in bi-axially textured rare earth barium copper oxide (REBCO) co…
Artificially engineered superlattices of pnictide superconductor
S. Lee, C. Tarantini, P. Gao +9
Significant progress has been achieved in fabricating high quality bulk and thinfilm iron-based superconductors. In particular, artificial layered pnictide superlattices offer the…
Performance of Titanium-Oxide/Polymer Insulation in Bi-2212/Ag-alloy Round Wire Wound Superconducting Coils
Peng Chen, Ulf P Trociewitz, Matthieu Dalban-Canassy +3
Conductor insulation is one of the key components needed to make Ag-alloy clad Bi2Sr2CaCu2O8+x (Bi-2212/Ag) superconducting round wire (RW) successful for high field magnet applica…
Reduction of gas bubbles and improved critical current density in Bi-2212 round wire by swaging
Jianyi Jiang, Hanping Miao, Yibing Huang +8
Bi-2212 round wire is made by the powder-in-tube technique. An unavoidable property of powder-in-tube conductors is that there is about 30% void space in the as-drawn wire. We have…
Artificial and self-assembled pinning centers in Ba(Fe1-xCox)2As2 thin films as a route to very high current density
C. Tarantini, S. Lee, F. Kametani +7
We report on the superior vortex pinning of single and multilayer Ba(Fe1-xCox)2As2 thin films with self-assembled c-axis and artificially introduced ab-plane pins. Ba(Fe1-xCox)2As2…
High intergrain critical current density in fine-grain (Ba0.6K0.4)Fe2As2 wires and bulks
J. D. Weiss, C. Tarantini, J. Jiang +4
The K- and Co-doped BaFe2As2 (Ba-122) superconducting compounds are potentially useful for applications because they have upper critical fields (Hc2) of well over 50 T, Hc2 anisotr…
35.4 T field generated using a layer-wound superconducting coil made of (RE)Ba2Cu3O7-x (RE = Rare Earth) coated conductor
Ulf P. Trociewitz, Matthieu Dalban-Canassy, Muriel Hannion +6
To explore the limits of layer wound (RE)Ba2Cu3O7-x (REBCO, RE = Rare Earth) coils in a high magnetic field environment > 30 T, a series of small insert coils have been built and c…
The behavior of grain boundaries in the Fe-based superconductors
J. H. Durrell, C. -B. Eom, A. Gurevich +4
The Fe-based superconductors (FBS) are an important new class of superconducting materials. As with any new superconductor with a high transition temperature and upper critical fie…
Evidence that the upper critical field of Nb3Sn is independent of whether it is cubic or tetragonal
Jian Zhou, Younjung Jo, Zu Hawn Sung +3
Although 2011 marks the 50th anniversary of Nb3Sn as the first high field superconductor, real understanding of its upper critical field behavior μ0Hc2 is incomplete. Here we show…
Superfluid density measurements of Ba(CoxFe1-x)2As2 films near optimal doping
Jie Yong, S. Lee, J. Jiang +6
We report the first direct measurements of superfluid density, ns(T) \propto λ-2(T), in films of Fe-pnictide superconductors. The magnetic penetration depth, λ(0), in our epitaxial…
Evidence for electromagnetic granularity in polycrystalline Sm1111 iron-pnictides with enhanced phase purity
A. Yamamoto, J. Jiang, F. Kametani +7
We prepared polycrystalline SmFeAsO1-xFx (Sm1111) bulk samples by sintering and hot isostatic pressing (HIP) in order to study the effects of phase purity and relative density on t…
Observation of a coherence peak and pair-breaking effects in THz conductivity of BaFeCoAs
R. Valdés Aguilar, L. S. Bilbro, S. Lee +6
We report a study of high quality pnictide superconductor BaFeCoAs thin films using time-domain THz spectroscopy. Near T we find evidence for a coherence…
Strong vortex pinning in Co-doped BaFe2As2 single crystal thin films
C. Tarantini, S. Lee, Y. Zhang +13
We report measurements of the field and angular dependences of Jc of truly epitaxial Co-doped BaFe2As2 thin films grown on SrTiO3/(La,Sr)(Al,Ta)O3 with different SrTiO3 template th…
Disorder effects and current percolation in FeAs based superconductors
M. Eisterer, M. Zehetmayer, H. W. Weber +7
We report the influence of atomic disorder introduced by sequential neutron irradiation on the basic superconducting properties, flux pinning and grain connectivity. Two different…