STUDY ON MAGNETORESISTANCE OF IMPLANTED POLYPARAPHENYLENE FILMS

From the study of magnetoresistance (MR) versus induction B, we find a positive MR at room temperature in the case of low fluence, implanted polyparaphenylene films: this component is related to electronic corr elation effects. During implantation with high fluences, a negative MR contribution appears, this effect being reinforced by low temperature . We conclude that localization effects are responsible for this behav iour, which is particularly important in the case of implanted polymer s. (C) 1998 Elsevier Science Ltd. All rights reserved.