Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9837454 | Physica B: Condensed Matter | 2005 | 6 Pages |
Abstract
Polycrystalline La0.5Lu0.2Sr0.3MnO3 samples prepared by thermal decomposition are investigated by means of electron diffraction and high-resolution transmission electron microscopy. Besides rhombohedral La0.7Sr0.3MnO3 phase (R-phase) and hexagonal LuMnO3 phase (H-phase) reported by Huang, unexpectedly, an orthorhombic lattice (O-phase) with space group Pnma is observed in the interior of R-phase grain. The lattice parameters of the orthorhombic unit cell are ao=5.44Ã
, bo=7.65Ã
and co=5.48Ã
. The formation of O-phase results from aâb+aâ type orthorhombic distortion of MnO6 octahedra induced by partial substitution of Lu3+ for La3+. Meanwhile, based on image simulation of the interface between R and O-phases, the atomic bonding on the interface is particularly discussed.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
B.Z. Sun, L.L. He, F. Luo, C.H. Yan,