Critical behaviour in $La_{0.5}Sr_{0.5}CoO_3$

Details Critical behaviour in $La_{0.5}Sr_{0.5}CoO_3$ Critical behaviour in $La_{0.5}Sr_{0.5}CoO_3$

1998-12-31

arxiv.org/abs/cond-mat/9812433v1

Physics

Condensed Matter

Materials Science

Text+12 Figures (Submitted to JPCM)

Scientific paper

We have studied the critical behaviour in $La_{0.5}Sr_{0.5}CoO_{3}$ near the paramagnetic-ferromagnetic transition temperature. We have analysed our dc magnetisation data near the transition temperature with the help of modified Arrott plots, Kouvel-Fisher method. We have determined the critical temperature $T_c$ and the critical exponents, $\beta$ and $\gamma$. With these values of $T_c$, $\beta$ and $\gamma$, we plot $M/(1-T/T_c)^{\beta}$ vs $H/(1-T/T_c)^{\gamma}$. All the data collapse on one of the two curves. This suggests that the data below and above $T_c$ obeys scaling, following a single equation of state.

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