Conveners
Wed-Mo-Orals Session 9: BSCCO, MgB2, Fe-pnictides and New Superconducting Materials
- Dmytro Abraimov (NHMFL)
Dr
Fumitake Kametani
(National High Magnetic Field Laboratory)
09/07/2014, 11:00
M-03: BSCCO wires and tapes processing and properties
By utilizing the over pressure technique, Bi2Sr2CaCu2Ox (Bi2212) round wires without macroscopic texture recently achieved Jc of 4000 A/mm2 at 4.2 K, 5T, despite the presence of many universally-assumed obstructing high angle grain boundaries (HAGBs). We sought to understand the nature of more local scale texture, in particular to better understand the apparent disagreement between Bi2212 and...
Dr
Alexander Otto
(Solid Material Solutions, LLC)
09/07/2014, 11:30
M-03: BSCCO wires and tapes processing and properties
Oral presentation (15min)
Superconducting oxide (HTS) – based conductors must support large stresses and strains in demanding next-generation high field applications without current density and structural degradation. This paper describes recent advances in the mechanical properties of HTS-based commercial and development stage conductors. A comprehensive design model has been established and applied to the development...
Dr
Tomoyuki Naito
(Iwate University)
09/07/2014, 11:45
M-04: MgB2 processing and properties
Oral presentation (15min)
MgB2 superconductors have mainly been studied for the practical application of tapes and thin films owing to its high Tc of about 39 K and a high upper critical field among metallic superconductors. We have studied that the trapped field properties of MgB2 bulk samples fabricated by the capsule and hot isostatic pressing (HIP) methods and succeeded in producing the 2-3 T class bulk magnet....
Prof.
Kohei Higashikawa
(Kyushu University)
09/07/2014, 12:00
M-04: MgB2 processing and properties
Oral presentation (15min)
We have succeeded in characterizing critical current properties of recent high-performance MgB2 wires at very high critical current conditions. Generally, critical currents of a wire are measured by four-probe transport measurements. However, for high critical current conditions, e.g., at relatively low magnetic fields, it is difficult to perform the measurement due to heat generation and/or...
carlo ferdeghini
(C)
09/07/2014, 12:30
M-07: Pnictides and new superconducting materials
Oral presentation (15min)
Among the various families of Fe-based superconductors, iron chalcogenides, although presenting a not particularly high transition temperature, show great advantages for potential applications in high field, albeit at liquid helium temperature .
The critical temperature in thin films can be increased by applying stress up to 21 K, but the stress can push the critical field up to more than 50...
Dr
Armen Gulian
(Chapman University)
09/07/2014, 12:45
M-07: Pnictides and new superconducting materials
Oral presentation (15min)
The BCS, or bosonic model of superconductivity, as Little and Ginzburg have argued, can in the case of high-enough frequency of bosonic mode bring in superconductivity at room temperatures. It was further elucidated by Kirzhnits et al., that the condition for existence of the high-temperature superconductivity is closely related with negative values of the real part of dielectric function at...
