Coaction and competition between the ferroelectric field effect and the strain effect in Pr 0.5Ca 0.5MnO 3 film/0.67Pb(Mg 1/3Nb 2/3)O 3-0.33PbTiO 3 crystal heterostructures

Q. X. Zhu, W. Wang, S. W. Yang, X. M. Li, Y. Wang, H. U. Habermeier, H. S. Luo, H. L.W. Chan, X. G. Li, R. K. Zheng

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Abstract

The coaction and competition between the ferroelectric field effect and the strain effect in Pr 0.5Ca 0.5MnO 3 (PCMO) film/0.67Pb(Mg 1/3Nb 2/3)O 3-0.33PbTiO 3 crystal heterostructures were studied. Based on different types of resistance-electric field hysteresis loops at various temperatures, it is clearly identified that the strain effect dominates over the ferroelectric field effect for temperature T above the charge-ordering temperature T CO of PCMO. With the strong localization of charge carriers for T T CO, the ferroelectric field effect strongly competes with the strain effect and finally dominates over the latter for T 0.8T CO. Moreover, the poling-induced strain effect is considerably enhanced by a magnetic field, demonstrating the important role of the phase separation in understanding the strain effect in such heterostructures.

Original languageEnglish
Article number172906
JournalApplied Physics Letters
Volume101
Issue number17
DOIs
StatePublished - 22 Oct 2012
Externally publishedYes

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