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Coexistence of magnetic and ferroelectric properties in Y_(0.1)Co_(1.9) MnO_4

Coexistence of magnetic and ferroelectric properties in Y_(0.1)Co_(1.9) MnO_4
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摘要 The magnetic, conductivity, and dielectric properties have been investigated in single-phase polycrystalline Y0.1Co1.9MnO4. The temperature-dependent magnetisation reveals the ferromagnetic transition in sample at a low temperature (~186 K). Magnetisation as a function of field H (M H loop) indicated the weak ferromagnetism of the sample at room temperature. The constant e and dielectric loss tg5 measurements represent a ferroelectric phase transition at a higher temperature (~650 K), while the conductivity shows an insulator-metallic transition. The ferro- electric hysterisis loops and capacitance voltage measurements confirm the ferroelectric nature of the sample at room temperature. The observed ferromagnetism and ferroelectric nature in this material suggests a potential multiferroic application. The magnetic, conductivity, and dielectric properties have been investigated in single-phase polycrystalline Y0.1Co1.9MnO4. The temperature-dependent magnetisation reveals the ferromagnetic transition in sample at a low temperature (~186 K). Magnetisation as a function of field H (M H loop) indicated the weak ferromagnetism of the sample at room temperature. The constant e and dielectric loss tg5 measurements represent a ferroelectric phase transition at a higher temperature (~650 K), while the conductivity shows an insulator-metallic transition. The ferro- electric hysterisis loops and capacitance voltage measurements confirm the ferroelectric nature of the sample at room temperature. The observed ferromagnetism and ferroelectric nature in this material suggests a potential multiferroic application.
作者 刘毅
机构地区 College of Science
出处 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第7期497-500,共4页 中国物理B(英文版)
基金 supported by the Doctorial Start-up Fund of Guizhou University of China (Grant No. 2006/Z065020)
关键词 spinel oxide DIELECTRIC CONDUCTIVITY MAGNETIC spinel oxide, dielectric, conductivity, magnetic
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