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

X. X. Zhang; J. M. Hernandez

doi:10.1209/epl/i1999-00414-0

Observation of colossal positive and negative magnetoresistance in perovskite-type manganese oxide Nd_0.67Ca_0.33MnO₃

X. X. Zhang^*, J. M. Hernandez

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

The co-existence of colossal positive and negative magnetoresistance has been observed in a perovskite-type material Nd_0.67Ca_0.33MnO₃. 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, T_I-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 language	English (US)
Pages (from-to)	487-493
Number of pages	7
Journal	Europhysics Letters
Volume	47
Issue number	4
DOIs	https://doi.org/10.1209/epl/i1999-00414-0
State	Published - Aug 11 1999
Externally published	Yes

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

abstract = "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.",

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AU - Zhang, X. X.

AU - Hernandez, J. M.

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Y1 - 1999/8/11

N2 - 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.

AB - 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.

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DO - 10.1209/epl/i1999-00414-0

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EP - 493

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IS - 4

ER -

Observation of colossal positive and negative magnetoresistance in perovskite-type manganese oxide Nd_0.67Ca_0.33MnO₃

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