Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1802968 | Journal of Magnetism and Magnetic Materials | 2009 | 4 Pages |
Abstract
Pure and Co-doped single-phase CeO2 crystals were synthesized by a solid-state reaction method. Samples of different oxygen vacancy concentration were studied, including (1) as-sintered crystals, (2) powders ground from the same crystal, and (3) a cold-pressed pellet from the ground powder that was unannealed and annealed at 800 °C. By analyzing the magnetic behaviors, surface/volume ratio and O vacancy concentration, the effects of oxygen vacancies on the room-temperature ferromagnetism (RT-FM) of Co-doped CeO2 were systematically investigated. The results confirm that the RT-FM observed in Co-doped CeO2 has a direct relationship with the oxygen vacancy concentration, and support the oxygen vacancy mediated FM mechanism.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Qi-Ye Wen, Huai-Wu Zhang, Qing-Hui Yang, Yuan-Qiang Song, John Q. Xiao,