Structure and physical properties of layered double perovskite NdBaCo2O5.50 + δ (δ ≈ 0.25) |
| |
Authors: | L S Lobanovsky I O Troyanchuk H Szymczak O Prokhnenko |
| |
Institution: | (1) Joint Institute of Solid State and Semiconductor Physics, Belarussian National Academy of Sciences, Minsk, 220072, Belarus;(2) Institute of Physics, Polish Academy of Sciences, PL-02-668 Warsaw, Poland;(3) Hann Maitner Institute, 14109 Berlin, Germany |
| |
Abstract: | Magnetic, electric, and elastic properties of the crystal and magnetic structure of double layered perovskite NdBaCo2O5.50 + δ are studied by the neutron diffraction method at various temperatures. The data are analyzed using two models of crystal structure. In the first model, the sample consists of two crystal-structure phases with ordered and disordered arrangements of oxygen vacancies. In the second model, a new crystal-structure phase is formed in this compound, which is characterized by ordering of oxygen vacancies in the plane of the rare-earth ion in the 1c crystallographic position (0, 0, 1/2) of space group Pmmm. Two crystal-structure models correspond to different types of magnetic ordering (a mixture of a ferromagnetic phase and a G-type antiferromagnetic phase is presumed in the two-phase crystal-structure model, while a canted antiferromagnetic structure is presumed in the one-phase crystal structure model). The behavior of electric and elastic parameters is better described in the first model, while neutron diffraction studies are in better agreement with the second model. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|