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Phthalocyanine doping to improve critical current densities in MgB2tapes
- Source :
- Superconductor Science and Technology. 22:045019
- Publication Year :
- 2009
- Publisher :
- IOP Publishing, 2009.
-
Abstract
- Phthalocyanine-doped MgB2 tapes were prepared by the in situ powder-in-tube method. The relationships between the critical current properties, crystallinity and microstructure were studied as a function of the phthalocyanine doping level. It is found that both Hirr and Hc2 were improved when MgB2 samples were doped with phthalocyanine, which are mainly attributed to the effective carbon substitution and enhanced flux pinning strength caused by very fine grain sizes. Furthermore, compared to pure samples, the MgO content remained almost unchanged in all doped tapes, which is very beneficial to having better grain connectivity in MgB2. Significantly improved Jc was obtained in the phthalocyanine-doped MgB2 tapes, especially under high magnetic fields.
- Subjects :
- Materials science
Flux pinning
Condensed matter physics
Doping
Metals and Alloys
chemistry.chemical_element
02 engineering and technology
021001 nanoscience & nanotechnology
Condensed Matter Physics
Microstructure
01 natural sciences
Magnetic field
chemistry.chemical_compound
Crystallinity
chemistry
0103 physical sciences
Materials Chemistry
Ceramics and Composites
Phthalocyanine
Critical current
Electrical and Electronic Engineering
Composite material
010306 general physics
0210 nano-technology
Carbon
Subjects
Details
- ISSN :
- 13616668 and 09532048
- Volume :
- 22
- Database :
- OpenAIRE
- Journal :
- Superconductor Science and Technology
- Accession number :
- edsair.doi...........19fd162f70d4aad7082640e5e3fc4899