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- W1872104002 abstract "Magnetic properties of La$_{1-x}$Ca$_{x}$CoO$_{3}$ (0.10 $leq xleq$ 0.25) are systemically studied in this work. All the samples exhibits the ferromagnetic state at low temperatures. However, their inverse low-field magnetic susceptibilities shows a sharply downward deviation from high-temperature Curie-Weiss paramagnetic behavior well above the ferromagnetic transition temperature ($T_C$), which indicates the presence of a ferromagnetic clustered state above $T_C$. A detailed analysis on the susceptibilities reveals that the short-range state in these Ca-doped samples can be well described as the Griffiths phase. This characteristic is quite different from those of the clustered states above $T_C$ recently reported in Sr- and Ba-doped cobaltites, which are non-Griffith-like. It is proposed that this difference possibly arises from the unique dependence of magnetic interactions among Co$^{3+}$ ions on the size of the dopant in the doped cobaltites. Based on these results, the magnetic diagram of the Ca-doped cobaltites is established." @default.
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- W1872104002 date "2012-07-12" @default.
- W1872104002 modified "2023-09-27" @default.
- W1872104002 title "Griffiths singularity and magnetic phase diagram of La1-xCaxCoO3" @default.
- W1872104002 hasPublicationYear "2012" @default.
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