B-Site Fe/Re Cation-Ordering Control and Its Influence on the Magnetic Properties of Sr₂FeReO₆ Oxide Powders.

ABSTRACT: Double-perovskite oxide Sr₂FeReO₆ (SFRO) powders have promising applications in spintronics due to their half-metallicity and high Curie temperature. However, their magnetic properties suffer from the existence of anti-site defects (ASDs). Here, we report on the synthesis of SFRO powders by the sol-gel process. The B-site cationic ordering degree (η) and its influence on magnetic properties are investigated. The results demonstrate that the η value is well controlled by the annealing temperature, which is as high as 85% when annealing at 1100 °C. However, the annealing atmospheres (e.g., N₂ or Ar) have little effect on the η value. At room temperature, the SFRO powders crystallize in a tetragonal crystal structure (space group I4

SUBMITTER: Wang Z 

PROVIDER: S-EPMC9611336 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature