In this paper, a study of the effect of Al substitution on the upper critical field, Bc2, in AlxMg1−xB2 samples is presented. We find a straightforward correlation between Bc2 and the σ-band gap, Δσ, evaluated by pointcontact measurements. Up to x=0.2, Bc2 can be well described within a clean limit model and its decrease with x is directly related to the suppression of Δσ.
Critical field of Al-doped MgB2 samples: Correlation with the suppression of the s-band gap
PUTTI, MARINA;MANFRINETTI, PIETRO;PALENZONA, ANDREA;
2005
Abstract
In this paper, a study of the effect of Al substitution on the upper critical field, Bc2, in AlxMg1−xB2 samples is presented. We find a straightforward correlation between Bc2 and the σ-band gap, Δσ, evaluated by pointcontact measurements. Up to x=0.2, Bc2 can be well described within a clean limit model and its decrease with x is directly related to the suppression of Δσ.
File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
