Tb掺杂LaMnO_3材料的电输运与介电性能研究

Electrical Transport and Dielectric Properties of Perovskite Tb Doped LaMnO_3

采用固相反应法制备了A位掺杂的La0.95Tb0.05MnO3(LTMO)钙钛矿材料。研究了LTMO的电输运性能、磁性能以及介电性能。结果表明,LTMO表现出半导体电输运特性,其磁序结构表现出类自旋玻璃行为,而其介电性能在100K附近表现出弛豫特性,当温度高于100K时LTMO介电常数ε′随温度的升高几乎不变化,表现出介电常数的高温稳定性。

Polycrystalline bulk perovskite La0.95Tb0.05MnO3 （LTMO） were synthesized by conventional solid state reaction. Electric transport property, magnetic and dielectric property were examined. LTMO exhibits semicon ductor, and its magnetic properties are spin-glass like behavior. It possesses the dielectric relaxation at lower 100K. Furthermore, the dielectric properties remain almost unchanged at higher 100K.