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Delicate balance between ferroelectricity and antiferroelectricity in hexagonal InMnO3
被引:33
|作者:
Huang, F. -T.
[1
,2
]
Wang, X.
[1
,2
]
Oh, Y. S.
[1
,2
]
Kurushima, K.
[3
]
Mori, S.
[4
]
Horibe, Y.
[1
,2
]
Cheong, S. -W.
[1
,2
]
机构:
[1] Rutgers State Univ, Rutgers Ctr Emergent Mat, Piscataway, NJ 08854 USA
[2] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA
[3] Toray Res Ctr, Otsu, Shiga 5208567, Japan
[4] Osaka Prefecture Univ, Dept Mat Sci, Sakai, Osaka 5998531, Japan
基金:
美国国家科学基金会;
关键词:
D O I:
10.1103/PhysRevB.87.184109
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
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 P6(3)cm symmetry, but a nonferroelectric P (3) over bar c1 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.
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