Observation of colossal positive and negative magnetoresistance in perovskite-type manganese oxide Nd0.67Ca0.33MnO3

Xixiang Zhang*, J. M. Hernandez

*Corresponding author for this work

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19 Scopus citations


The co-existence of colossal positive and negative magnetoresistance has been observed in a perovskite-type material Nd0.67Ca0.33MnO3. The hysteretic behavior of resistivity in temperature and magnetic field suggests the existence of phase transition. Positive magnetoresistance (positive-MR = [ρ(B) - ρ(0)]/ρ(0)) up to 10000% was observed below insulator-metal transition temperature, TI-M ∼ 45 K, accompanied by a negative magnetoresistance (negative-MR) with further increasing magnetic field. The positive-MR may be attributed to the field-induced carrier localization (CL), whereas the very large negative-MR is believed to be due to the field-induced collapse of charge ordering.

Original languageEnglish (US)
Pages (from-to)487-493
Number of pages7
JournalEurophysics Letters
Issue number4
StatePublished - Aug 11 1999

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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