2007/01/14 by X. G. Luo, Xigang Luo, Wendong Xing +8
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Materials Science (cond-mat.mtrl-sci) #Multiferroics and related materials #Strongly Correlated Electrons (cond-mat.str-el) #Thermal Expansion and Ionic Conductivity #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.cond-mat/0701302
13 pages, 10 figures. To be published in Phys. Rev. B
arxiv created 2007/01/14 · openalex publication_date 2007/01/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We systematically studied the magnetic and transport properties for the polycrystalline samples of Fe-doped perovskite cobaltites: Pr1-yCayCo1-xFexO3 (y=0.3, x=0-0.15; y=0.45, x=0-0.3) and Gd0.55Sr0.45Co1-xFexO3 (x=0-0.3). Fe doping leads to an enhancement of the ferromagnetism in the systems of Pr1-yCayCo1-xFexO3, while the ferromagnetism is suppressed with further increasing Fe content and spin-glass behavior is observed at high doping level of Fe. In contrast, the ferromagnetism is suppressed in the system Gd0.55Sr0.45Co1-xFexO3 as long as Fe is doped, and no spin-glass behavior is observed in the sample with Fe doping up to 0.3. The competition between ferromagnetic interactions through Fe3+-O-(LS)Co4+ and antiferromagnetic interactions through Fe3+-O-Fe3+ and Fe3+-O-(IS)Co3+ is considered to be responsible for the behavior observed above. The average radius of the ions on A sites plays the key role in determining what type of interactions Fe doping mainly introduces.