Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2011-09-08
Physics
Condensed Matter
Strongly Correlated Electrons
20 pages, 10 figures; J. Appl. Phys. vol. 110 issue 5 (2011)
Scientific paper
10.1063/1.3633521
The effect of oxygen content on the magnetic properties of the layered perovskites has been investigated. The samples, PrBaCo$_{2}$O$_{5+\delta}$ (0.35 $\leq \delta \leq$ 0.80) were prepared by sol-gel method and characterized by X-ray diffraction and DC magnetization. A detailed magnetic phase diagram for PrBaCo$_{2}$O$_{5+\delta}$ is presented. It is found that unlike in the case of heavier rare-earths, ferromagnetic interactions are present at all temperatures below Tc and even in the antiferromagnetically ordered phase. Moreover, in compounds with lower oxygen content, short range ferromagnetic interactions are present even above Tc. This dependence of magnetic properties on oxygen content in these layered perovskites has been linked to the changes in polyhedra around the Co ions.
Banerjee Anindita
Ganorkar Shraddha
Priolkar K. R.
Sarode P. R.
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