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arXiv · 1303.5606

Is hexagonal InMnO3 ferroelectric?

F. -T. Huang·X. Wang·Y. S. Oh·K. Kurushima·S. Mori·Y. Horibe·S. -W. Cheong
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Abstract

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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F. -T. Huang, X. Wang, Y. S. Oh, K. Kurushima, S. Mori, Y. Horibe, S. -W. Cheong. 2013-03-22. Is hexagonal InMnO3 ferroelectric?. https://doi.org/10.1103/physrevb.87.184109

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