Bulk conduction and nonlinear behaviour in multiferroic YMnO3

被引：41
|
作者：
Ren, Pengrong [1 ]
Fan, Huiqing [1 ]
Wang, Xin [1 ]
机构：
[1] Northwestern Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 15期
关键词：
FERROELECTRICITY; ORIGIN; SNO2;
D O I：
10.1063/1.4824916
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Electrical conductivity of YMnO3 in O-2, air, and N-2 has been investigated by impedance spectroscopy. Within the investigated temperature range, three types of electrical conductivity were distinguished. Below 300 degrees C, the conductivity is dominated by p-type conductivity, while between 300 and 500 degrees C, the conductivity is in the so called saturation region. Above 500 degrees C, n-type conductivity occurred, probably due to the loss of oxygen. The air-processed YMnO3 is characterized by the presence of mixed Mn3+/Mn4+ and electrical heterogeneous structure, which are responsible for both, dielectric anomaly observed between 200 and 300 degrees C and nonlinear behavior under high electric field. (C) 2013 AIP Publishing LLC.
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页数：5
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