Papavassiliou G, Fardis M, Belesi M, Maris T G, Kallias G, Pissas M, Niarchos D, Dimitropoulos C, Dolinsek J
Institute of Materials Science, National Center for Scientific Research "Demokritos," 153 10 Athens, Greece.
Phys Rev Lett. 2000 Jan 24;84(4):761-4. doi: 10.1103/PhysRevLett.84.761.
55Mn NMR line shape measurements in La1-xCaxMnO3 for 0.20< or =x< or =0.50 provide experimental evidence about the existence of two distinct regions in the T-x magnetic phase diagram, where the homogeneous ferromagnetic (FM) metallic state is separated into FM metallic and FM insulating regions. These results are in agreement with recent theoretical predictions, which reveal a novel electronic phase separation in two FM states, providing orbital ordering and Jahn-Teller phonons are taken into consideration.
在0.20≤x≤0.50的La1-xCaxMnO3中进行的55Mn核磁共振线形测量，为T-x磁相图中两个不同区域的存在提供了实验证据，其中均匀铁磁（FM）金属态被分为FM金属区和FM绝缘区。这些结果与最近的理论预测一致，该理论预测揭示了两种FM态中的一种新型电子相分离，前提是考虑了轨道有序和 Jahn-Teller 声子。
