Inhaltszusammenfassung

The influence of structural inhomogeneities on the superconducting critical temperature Tc, upper critical field BC2(T) and magnetoresistivity ??(B,T) of amorphous (Mo0.6Ru0.4)100-xBx films is reported. We find that the inclusion of pores with dimensions up to about 10 nm leads to an enhancement of the initial slope -BC2' by nearly one order of magnitude accompanied by a depression of Tc. From the ?- and Bc2-data we conclude a further reduction of the electronic diffusivity due to these inhom...The influence of structural inhomogeneities on the superconducting critical temperature Tc, upper critical field BC2(T) and magnetoresistivity ??(B,T) of amorphous (Mo0.6Ru0.4)100-xBx films is reported. We find that the inclusion of pores with dimensions up to about 10 nm leads to an enhancement of the initial slope -BC2' by nearly one order of magnitude accompanied by a depression of Tc. From the ?- and Bc2-data we conclude a further reduction of the electronic diffusivity due to these inhomogeneities, in spite of the already short mean free path in amorphous metals, which may be also responsible for the observed Tc-behavior. Additionally we find systematic differences of the magnetoresistivities measured up to 23 Tesla between homogeneous and inhomogeneous films. » weiterlesen» einklappen

Autoren

Klassifikation

DFG Fachgebiet:
Physik der kondensierten Materie

DDC Sachgruppe:
Physik