Crystal Structure, Magnetic and Electrical Properties of (Tb1−xNax)MnO3 (x = 0 and 0.15)

T. S. Chan ； R. S. Liu ； Y. H. Lien ； C. Y. Huang ； J. G. Lin

《Chinese Journal of Physics》 43卷3S期 (2005/06) Pp. 757-762

並列摘要

We have investigated the crystal structure, magnetic and electrical properties of (Tb1-xNax)MnO3 (x = 0 and 0.15). These materials have been prepared in polycrystalline by solid-state reaction. The orthorhombic structure with space group Pbnm is observed in these materials. (Tb1-xNax)MnO3 samples exhibit paramagnetic to antiferromagnetic transition temperature of ～ 10 K and ～ 20 K for x = 0 and x = 0.15 samples respectively. The corresponding transition temperature is increased with increasing Na content. Moreover, a decrease in E +W value from 62 meV (x = 0) to 38 meV (x = 0.15) was found. This may be due to the reduction of activation energy and resistivity in the parent compound by Na substitution.