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A correlation of phase diagrams with sharp jumps of the magnetization, which were previously observed upon magnetic-field-induced AFM-FM transition, has been studied for a number of low-bandwidth manganites. This transition was shown to proceed in milliseconds and is connected to a spontaneous heat avalanche, but mechanisms responsible for an origin and a development of the avalanche are still unclear. Different manganites (Pr0.67Ca0.33MnO3, Sm0.55Sr0.45Mn18O3, Eu0.58Sr0.42MnO3) are shown to characterize by a qualitatively identical phase diagram, with the slope of the AFM-FM boundary in the H-T-plane being negative, that is probably guides the avalanche-like character of the transition.

Correlation of phase diagrams and spontaneous magnetization jumps in low-bandwidth manganites