Peculiarities of quantium oscillations of longitudional Hall effect in high magnetic firelds im bismuth becrystals

Abstract

We report the results of longitudinal Hall effect (LHE) study in Bi bicrystals with nano-width superconducting crystallite interfaces (CIs), converted by magnetic field or current in normal state, in order to elucidate the high field (up to 40T) peculiarities of quantum oscillations. At B>2T directed along CIs plane two new harmonics of oscillations as well as a number of quantum Hall quasi-plateaus have been observed. It was found that the detected quasi-plateaus disappeared at magnetic field reversal. This indicates that in bicrystals there are spin – oriented carriers located in spectrum of Landau levels.