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We discuss the emergence of low dimensional ferroelectricity inself-organized Pr0.67Ca0.33MnO3 nanocrystalline arrays deposited on Sisubstrate. We observe sharp switching of electric polarization under externalelectric eld with nearly rectangular hysteresis loops which persist up to 150K. We discuss the polarization switching kinetics within the framework ofKolmogorov-Avrami-Ishibashi Model which gives maximum domain wall speed of ~1m/s. Polarized Raman spectroscopy shows evidence of isolated ferroelectricdomains even at room temperature.

Emergence of ferroelectric switching in self organized Pr0.67Ca0.33MnO3 nanocrystal array