Open AccessINFLUENCE OF Cu DOPING IN Mn SITES OF La-Ca-Mn-O SYSTEM ON MAGNETORESISTANCE EFFECT AT LIQUID NITROGEN
Author(s) -
Sun Xia,
Peisong Tang,
Huang Zhen,
Yue Chen,
Guang Li,
Zhiyou Chen,
Zhiming Liu,
Yuan Song-Liu
Publication year - 1998
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.47.965
Subject(s) - magnetoresistance , doping , liquid nitrogen , materials science , colossal magnetoresistance , nitrogen , condensed matter physics , phase (matter) , field (mathematics) , analytical chemistry (journal) , magnetic field , chemistry , physics , optoelectronics , chromatography , quantum mechanics , organic chemistry , mathematics , pure mathematics
We studied the influence of Cu doping in Mn sites of single phase bulk materials La2/3Ca1/3Mn1-xCuxOy on their magnetoresistance effect at liquid nitrogen in experiment. We find that, for the best doped sample (x≈0.15), it shows great magnetoresistance effect clearly. Moreover, the main variation of the magnetoresistance is under the field below 1T. The MR ratio rises up to 5×104% when the field is increased to 6T. It increases three orders of magnitude compared with samples deviated from the best doping.