Magnetic properties of Nd0.5Pb0.5-xSrxMnO3 materials

• 来源期刊: 中国物理(英文版)
• 关键词: structure magnetic properties double exchange interaction transition temperature Tp Jahn-Teller distortion neutron diffraction.
• 年，卷（期）: 2003,（7）
• 页码范围: 789-791
• 页数: 3页
• 语种: 英文

摘要

The structure and magnetic properties of Nd0.5Pb0.5-xSrxMnO3 (0 ≤ x ≤0.4) manganites were systematicallyinvestigated. Significant changes in Curie temperature and metal-insulator (MI) transition temperature of the sampleswere observed. All samples exhibited a transition from paramagnetic semiconducting to ferromagnetic metallic state.Curie temperature TC and the MI transition temperature Tp increased with increasing Sr content. We attributed thesebehaviours to the enhancing of both the double exchange mechanism and the Jahn-Teller electron-phonon coupling.