CE AFI phase

The coexistence of two phases in the interval 0.972 < t < 0.980 has been demonstrated by several techniques. For example, Krapicka et al. (2001) found, with Mn NMR, FM inclusions within the CE AFI phase for Pro.5Cao.35Sro.i5Mn03 whereas they observed a PM phase coexisting with a FM phase just below Tc- The volume fraction of the FM phase IV increased with decreasing temperatirre imtil it abraptly vanished below Tn = Too the CE AFI phase below 7n = Too would be phase III consisting of ordered Zener polarons. The PM phase corresponds to the minority phase having a Tco-... 

Figure 61 shows the ZFC and FC M(T) curves for the FMM phase II, which show a first-order transition at 7c where the bond-length fluctuations become frozen out to restore the phonon contribution to the thermal conductivity, fig. 62. In the I + II two-phase samples t = 0.973 and t = 0.974, phase II is suppressed and phase fluctuations inhibit phonon formation below Tco or 7c. Tokura et al. (1996) applied hydrostatic pressure to the FM phase II of (Ndo.i25Smo.875)o.5Sro.5Mn03 having / /c they reported the appearance of a CE AFI second phase having a volume fraction that increased with pressure below Too = 7n- Since pressure... 

Fig. 4.2. Low pressure-low temperature region of pseudo-equilibrium phase diagram of cmium. The dashed line in the p-Ce phase region is the extension of the afy phase boundary to lower temperatures and pressures. The letters C.P. mean critical point.

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