Griffiths phase in solid-solution of ferromagnetic manganite and cobaltite

Details Griffiths phase in solid-solution of ferromagnetic manganite and cobaltite Griffiths phase in solid-solution of ferromagnetic manganite and cobaltite

2011-09-06

arxiv.org/abs/1109.1090v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 3 Figures

Scientific paper

We report the existence of Griffiths phase (GP) over a wide range of $x$ in La$_{0.6}$Sr$_{0.4}$Mn$_{1-x}$Co$_x$O$_3$, the solid solution of ferromagnetic (FM) La$_{0.6}$Sr$_{0.4}$MnO$_3$ and La$_{0.6}$Sr$_{0.4}$CoO$_3$, from magnetization measurements. In this compound, GP arises due to the quenching of randomly distributed Co-O-Mn antiferromagnetic bonds in the FM background. In contrary to divalent doped manganites, GP in the present system can exist entirely in the metallic state above $T_C$ (for $x$$<$0.10). Based on the present study, a magnetoelectronic phase diagram is drawn.

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