Delicate balance between ferroelectricity and antiferroelectricity in hexagonal InMnO3
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- Delicate balance between ferroelectricity and antiferroelectricity in hexagonal InMnO3
- Huang, F-T; Wang, X; Oh, Yoon Seok; Kurushima, K; Mori, S; Horibe, Y; Cheong, S-W
- TRANSITION; YMNO3
- Issue Date
- AMER PHYSICAL SOC
- PHYSICAL REVIEW B, v.87, no.18, pp.184109 -
- The presence of ferroelectricity in hexagonal InMnO3 has been highly under debate. The results of our comprehensive experiments of low-temperature (T) polarization, transmission electron microscopy, and high-angle annular dark-field scanning TEM on well-controlled InMnO3 reveal that the ground state is ferroelectric with P63cm symmetry, but a nonferroelectric P3̄c1 state exists at high T and can be quenched to room temperature. We found that the competing ferroelectric and antiferroelectric phases coexist in mesoscopic scales and can be deliberately controlled by varying thermal treatments. © 2013 American Physical Society.
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