INVESTIGADORES
MALACHEVSKY Maria Teresa
congresos y reuniones científicas
Título:
Jc and Hc2 anisotropy in MgB2 Tapes
Autor/es:
G. SERRANO; A. SERQUIS; L.CIVALE; B.MAIOROV; M. T. MALACHEVSKY; E.OSQUIGUIL; G.BRIDOUX; C. AYALA
Lugar:
Campinas, Brasil
Reunión:
Workshop; Latin American Workshop on Applications of Powder Diffraction; 2007
Resumen:
Since the discovery of superconductivity in magnesium diboride (MgB2) a lot of effort
has been done to understand and improve their superconducting properties. The low
cost, light weight and the highest critical temperature (Tc 39K) make this material an
excellent candidate to replace the Nb compounds in the development of technological
superconductors. The improvement in the critical current density of superconductor
wires made by the powder-in-tube (PIT) method, demonstrate the great potential of
this emerging superconductor for various practical applications, such as magnets for
magnetic resonance imaging (MRI), power cables, motors, energy storage systems,
generators, magnetic separators, transformers, etc. In the contrary of the well known
High Tc superconductors, this material does not present the weak link problem and
it is not necessary to get a good crystallographic alignment of the grains. However,
it was found that the Jc depends on the texturing in MgB2 tapes. In this work we
will present a Rietveld analysis of the MgB2 core tape for different deformation ratio
and composition. We will discuss the correlation of anisotropy in Jc and Hc2 with the
texturing of different analyzed samples.