Electrical transport properties of YCo_(1-x)Mn_xO_3(0 ≤x≤ 0.2)prepared by sol–gel process  

作　　者：刘义 李海金 

机构地区：[1]School of Mathematics and Physics, Anhui University of Technology [2]Institute of Optoelectronic Information Materials and Technologies, Anhui University of Technology

出　　处：《Chinese Physics B》2015年第4期355-359,共5页中国物理B（英文版）

基　　金：Project supported by the Anhui Provincial Science Key Foundation of Higher Education Institutions,China(Grant No.KJ2011A053);the National Natural Science Foundation of China(Grant No.51202005)

摘　　要：Mn substitution compounds YCOl-xMnxO3 （0 ≤ x ≤ 0.2） are synthesized by using the sol-gel process. Electrical transport properties of YCo1-xMnxO3 are investigated in the temperature range from 200 K to 780 K. The experimental results show that after Mn substitution the electrical resistivity of YCo1-xMnxO3 first increases, then decreases, which is due to the electrons introduced by Mn doping. The sign of Seebeck coefficient for YCo1-xMnxO3 （x ≠ 0） is positive or negative, which is also proved by the Hall coefficient measurement. Moreover, at about room temperature, the Seebeck coefficient of YCO1-xMnxO3 with 1% doping Mn content becomes a negative value, whose absolute value is maximum; furthermore, the absolute value gradually decreases with increasing the Mn substitution content, which can be explained by the double carder model.Mn substitution compounds YCOl-xMnxO3 （0 ≤ x ≤ 0.2） are synthesized by using the sol-gel process. Electrical transport properties of YCo1-xMnxO3 are investigated in the temperature range from 200 K to 780 K. The experimental results show that after Mn substitution the electrical resistivity of YCo1-xMnxO3 first increases, then decreases, which is due to the electrons introduced by Mn doping. The sign of Seebeck coefficient for YCo1-xMnxO3 （x ≠ 0） is positive or negative, which is also proved by the Hall coefficient measurement. Moreover, at about room temperature, the Seebeck coefficient of YCO1-xMnxO3 with 1% doping Mn content becomes a negative value, whose absolute value is maximum; furthermore, the absolute value gradually decreases with increasing the Mn substitution content, which can be explained by the double carder model.

关 键 词：perovskite cobalt oxides sol-gel process electrical transport 

分 类 号：TQ110.1[化学工程—无机化工]