Artículo
Influence of the Fe Concentration on the Superconducting Properties of Fe1-ySe
Amigó, María Lourdes
; Ale Crivillero, María Victoria
; Franco, Diego Gaspar
; Guimpel, Julio Juan
; Nieva, Gladys Leonor
Fecha de publicación:
04/2015
Editorial:
Springer/Plenum Publishers
Revista:
Journal of Low Temperature Physics
ISSN:
0022-2291
e-ISSN:
1573-7357
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We present a comparative study of electrical transport properties in the normal state and in the dissipative superconducting state between pure β-FeSe phase and Fe deficient Fe1−ySe crystals. We discuss the influence of the intergrowth of the magnetic hexagonal phase (Fe7Se8) in Fe deficient samples when compared to pure β-FeSe samples. In the superconducting state, we measured the ab-plane electrical resistivity with magnetic field up to 16 T and the electrical resistivity as a function of the angle between the c axis and the applied field. The angular dependence at fixed temperature below the superconducting critical temperature, Tc(H=0), is very different for both sets of crystals. The Fe deficient samples display a vortex pinning-related feature at ∼57° off the plane while the pure β-FeSe phase samples show the persistence of a strong angular-dependent magnetoresistance characteristic of the normal state electronic structure.
Palabras clave:
Chalcogenide
,
Vortex Pinning
,
Correlated Defects
,
Electrical Transport
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Articulos(CCT - PATAGONIA NORTE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Citación
Amigó, María Lourdes; Ale Crivillero, María Victoria; Franco, Diego Gaspar; Guimpel, Julio Juan; Nieva, Gladys Leonor; Influence of the Fe Concentration on the Superconducting Properties of Fe1-ySe; Springer/Plenum Publishers; Journal of Low Temperature Physics; 179; 1-2; 4-2015; 15-20
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