951 citations · 3.5k across the 12 of their papers we have counts for
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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…
New Fe-based superconductors: properties relevant for applications
M Putti, I Pallecchi, E Bellingeri +23
Less than two years after the discovery of high temperature superconductivity in oxypnictide LaFeAs(O,F) several families of superconductors based on Fe layers (1111, 122, 11, 111)…
Upper critical fields and thermally-activated transport of Nd(O_0.7F_0.3)FeAs single crystal
J. Jaroszynski, F. Hunte, L. Balicas +9
We present measurements of the resistivity and the upper critical field H_c2 of Nd(O_0.7F_0.3)FeAs single crystals in strong DC and pulsed magnetic fields up to 45 T and 60 T, resp…
Combined microstructural and magneto optical study of current flow in polycrystalline forms of Nd and Sm Fe-oxypnictides
F. Kametani, A. A. Polyanskii, A. Yamamoto +9
In order to understand why the inter- and intra-granular current densities of polycrystalline superconducting oxypnictides differ by three orders of magnitude, we have conducted co…
Evidence for two distinct scales of current flow in polycrystalline Sm and Nd iron oxypnictides
A. Yamamoto, A. A. Polyanskii, J. Jiang +13
Early studies have found quasi-reversible magnetization curves in polycrystalline bulk rare-earth iron oxypnictides that suggest either wide-spread obstacles to intergranular curre…
Very High Field Two-Band Superconductivity in LaFeAsO_0.89F_0.11
F. Hunte, J. Jaroszynski, A. Gurevich +7
The ongoing search for new superconductors has recently yielded a new family of oxypnictides composed of alternating La_2O_{2-x}F_x and Fe_2As_2 layers [1-4] with transition temper…
Limits of the upper critical field in dirty two-gap superconductors
A. Gurevich
An overview of the theory of the upper critical field in dirty two-gap superconductors, with a particular emphasis on MgB is given. We focus here on the maximum which…
Thermally-activated current transport in MgB_2 films
S. Patnaik, A. Gurevich, S. D. Bu +3
Thermally-activated flux flow (TAFF) resistivity above the irreversibility field is reported for two different c-axis textured MgB_2 superconducting films. Transport measurements a…
High-field superconductivity in alloyed MgB2 thin films
V. Braccini, A. Gurevich, J. E. Giencke +24
We investigated the effect of alloying on the upper critical field in 12 films, in which disorder was introduced by growth, carbon doping or He-ion irradiation, fi…
Very high upper critical fields in MgB2 produced by selective tuning of impurity scattering
A. Gurevich, S. Patnaik, V. Braccini +16
We report a significant enhancement of the upper critical field of different samples alloyed with nonmagnetic impurities. By studying films and bulk polycrystals w…
Strongly linked current flow in polycrystalline forms of the new superconductor MgB2
D. C. Larbalestier, M. O. Rikel, L. D. Cooley +19
The discovery of superconductivity at 39 K in MgB2[1] raises many issues. One of the central questions is whether this new superconductor resembles a high-temperature-cuprate super…