Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1595306 | Solid State Communications | 2008 | 4 Pages |
Abstract
Substitutions of Ni2+ cations for Co2+ in Y BaCo4O7 have been studied. Though the Ni2+ solubility is limited to about 5%, corresponding to Y BaCo3.8Ni0.2O7, it is found that the temperature of the structural transition TSTS decreases significantly as the Ni2+ content, xx in Y BaCo4−xNixO7, increases. This is shown by the electrical resistivity change observed at TS=235K for Y BaCo3.8Ni0.2O7 against TS=310K for the undoped Y BaCo4O7 compound. The similar ionic radii of Ni2+ and Co2+ in the tetrahedral coordination CoO4 strongly support a magnetic origin for the structural transition of the LBaCo4O7 compounds.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
A. Maignan, S. Hébert, V. Caignaert, V. Pralong, D. Pelloquin,