Transport properties and magnetoresistance in La0.8Te 0.2MnO3/ZrO2 composites

Jian Yuan Wang; Wei Zhai; Ke Xin Jin; Chang Le Chen

doi:10.1088/1674-1056/20/9/097202

Transport properties and magnetoresistance in La_0.8Te _0.2MnO₃/ZrO₂ composites

Jian Yuan Wang, Wei Zhai, Ke Xin Jin, Chang Le Chen

School of Physical Science and Technology

Northwestern Polytechnical University Xian

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

2 Scopus citations

Abstract

The transport properties and magnetoresistance of electron-doped manganate / insulator composites (La_0.8Te_0.2MnO₃) _1-x/(ZrO₂)_x(x = 0, 0.3, and 0.5) are investigated. It is found that the metal-insulator transition temperature of this system shifts to a lower value as the ZrO₂ content increases. The introduction of ZrO₂ enhances both the domain scattering and electron relative scattering in the metal transport region. In the adiabatic small polaron hopping transport region, the thermal activation energy seems invariable regardless of the ZrO₂ content. The application of a magnetic field promotes the charge transportation capabilities of the composites, and the magnetoresistance is enhanced with an increase of the ZrO₂ content. This could be attributed to the more remarkable modification effect of magnetic field on ordering degree in the composites than in pure La_0.8Te_0.2MnO₃.

Original language	English
Article number	097202
Journal	Chinese Physics B
Volume	20
Issue number	9
DOIs	https://doi.org/10.1088/1674-1056/20/9/097202
State	Published - Sep 2011

Keywords

composite
magnetoresistance
manganate
transport property

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10.1088/1674-1056/20/9/097202

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title = "Transport properties and magnetoresistance in La0.8Te 0.2MnO3/ZrO2 composites",

abstract = "The transport properties and magnetoresistance of electron-doped manganate / insulator composites (La0.8Te0.2MnO3) 1-x/(ZrO2)x(x = 0, 0.3, and 0.5) are investigated. It is found that the metal-insulator transition temperature of this system shifts to a lower value as the ZrO2 content increases. The introduction of ZrO2 enhances both the domain scattering and electron relative scattering in the metal transport region. In the adiabatic small polaron hopping transport region, the thermal activation energy seems invariable regardless of the ZrO2 content. The application of a magnetic field promotes the charge transportation capabilities of the composites, and the magnetoresistance is enhanced with an increase of the ZrO2 content. This could be attributed to the more remarkable modification effect of magnetic field on ordering degree in the composites than in pure La0.8Te0.2MnO3.",

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T1 - Transport properties and magnetoresistance in La0.8Te 0.2MnO3/ZrO2 composites

AU - Wang, Jian Yuan

AU - Zhai, Wei

AU - Jin, Ke Xin

AU - Chen, Chang Le

PY - 2011/9

Y1 - 2011/9

N2 - The transport properties and magnetoresistance of electron-doped manganate / insulator composites (La0.8Te0.2MnO3) 1-x/(ZrO2)x(x = 0, 0.3, and 0.5) are investigated. It is found that the metal-insulator transition temperature of this system shifts to a lower value as the ZrO2 content increases. The introduction of ZrO2 enhances both the domain scattering and electron relative scattering in the metal transport region. In the adiabatic small polaron hopping transport region, the thermal activation energy seems invariable regardless of the ZrO2 content. The application of a magnetic field promotes the charge transportation capabilities of the composites, and the magnetoresistance is enhanced with an increase of the ZrO2 content. This could be attributed to the more remarkable modification effect of magnetic field on ordering degree in the composites than in pure La0.8Te0.2MnO3.

AB - The transport properties and magnetoresistance of electron-doped manganate / insulator composites (La0.8Te0.2MnO3) 1-x/(ZrO2)x(x = 0, 0.3, and 0.5) are investigated. It is found that the metal-insulator transition temperature of this system shifts to a lower value as the ZrO2 content increases. The introduction of ZrO2 enhances both the domain scattering and electron relative scattering in the metal transport region. In the adiabatic small polaron hopping transport region, the thermal activation energy seems invariable regardless of the ZrO2 content. The application of a magnetic field promotes the charge transportation capabilities of the composites, and the magnetoresistance is enhanced with an increase of the ZrO2 content. This could be attributed to the more remarkable modification effect of magnetic field on ordering degree in the composites than in pure La0.8Te0.2MnO3.

KW - composite

KW - magnetoresistance

KW - manganate

KW - transport property

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Transport properties and magnetoresistance in La_0.8Te _0.2MnO₃/ZrO₂ composites

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