Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2007-01-14
Physics
Condensed Matter
Strongly Correlated Electrons
13 pages, 10 figures. To be published in Phys. Rev. B
Scientific paper
We systematically studied the magnetic and transport properties for the polycrystalline samples of Fe-doped perovskite cobaltites: Pr$_{1-y}$Ca$_{y}$Co$_{1-x}$Fe$_x$O$_3$ ($y$=0.3, $x$=0-0.15; $y$=0.45, $x$=0-0.3) and Gd$_{0.55}$Sr$_{0.45}$Co$_{1-x}$Fe$_x$O$_{3}$ ($x$=0-0.3). Fe doping leads to an enhancement of the ferromagnetism in the systems of Pr$_{1-y}$Ca$_{y}$Co$_{1-x}$Fe$_x$O$_3$, 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 Gd$_{0.55}$Sr$_{0.45}$Co$_{1-x}$Fe$_x$O$_{3}$ 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 Fe$^{3+}$-O-(LS)Co$^{4+}$ and antiferromagnetic interactions through Fe$^{3+}$-O-Fe$^{3+}$ and Fe$^{3+}$-O-(IS)Co$^{3+}$ 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.
Chen Xianhui
Li Zhaofeng
Luo Xigang
Wu Gang
Xing Wendong
No associations
LandOfFree
Impact of the Fe Doping on Magnetism in Perovskite Cobaltites does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Impact of the Fe Doping on Magnetism in Perovskite Cobaltites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Impact of the Fe Doping on Magnetism in Perovskite Cobaltites will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-122024