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Is hexagonal InMnO3 ferroelectric?

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arxiv 1303.5606 v2 pith:YAXMIV6R submitted 2013-03-22 cond-mat.mtrl-sci

F.-T. Huang , X. Wang , Y. S. Oh , K. Kurushima , S. Mori , Y. Horibe , S.-W. Cheong This is my paper · ORCID
classification cond-mat.mtrl-sci
keywords ferroelectricstatebeenh-inmno3hexagonalinmno3comprehensiveconfiguration
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The presence of ferroelectricity in hexagonal (h-)InMnO3 has been highly under debate. The results of our comprehensive experiments of low-temperature (T) polarization, TEM and HAADF-STEM on well-controlled h-InMnO3 reveal that the ground state is ferroelectric with P6_3cm symmetry, but a non-ferroelectric P-3c1 state exists at high T, and can be quenched to room T. We also found that the ferroelectric P6_3cm state of h-InMnO3 exhibits the domain configuration of topological vortices, as has been observed in h-REMnO3 (RE=rare earths).

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