Sodium niobate (NaNbO3, or NNO) is known to be antiferroelectric at temperatures between 45 and 753 K. Here we show experimentally the presence of the ferroelectric phase at temperatures between 100 and 830 K in the NNO crystals obtained by top-seeded solution growth. The ferroelectric phase and new phase transitions are evidenced using a combination of thermo-optical studies by variable angle spectroscopic ellipsometry, Raman spectroscopy analysis, and photoelectron emission microscopy. The possibility for strain-induced ferroelectricity in NNO is suggested.
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Tokyo Inst Technol, Mat & Struct Lab, Yokohama, Kanagawa 2268503, JapanTokyo Inst Technol, Mat & Struct Lab, Yokohama, Kanagawa 2268503, Japan
Arioka, Takahiro
Taniguchi, Hiroki
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Tokyo Inst Technol, Mat & Struct Lab, Yokohama, Kanagawa 2268503, JapanTokyo Inst Technol, Mat & Struct Lab, Yokohama, Kanagawa 2268503, Japan
Taniguchi, Hiroki
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Itoh, Mitsuru
Oka, Kunihiko
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Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, JapanTokyo Inst Technol, Mat & Struct Lab, Yokohama, Kanagawa 2268503, Japan
Oka, Kunihiko
Wang, Ruiping
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Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, JapanTokyo Inst Technol, Mat & Struct Lab, Yokohama, Kanagawa 2268503, Japan
Wang, Ruiping
Fu, Desheng
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Shizuoka Univ, Div Global Res Leaders, Naka Ku, Hamamatsu, Shizuoka 4328561, JapanTokyo Inst Technol, Mat & Struct Lab, Yokohama, Kanagawa 2268503, Japan
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Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R ChinaShandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
Ji, Shaozheng
Liu, Hong
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Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
Chinese Acad Sci, Beijing Inst Nanoenergy & Nanosyst, Beijing 100864, Peoples R ChinaShandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
Liu, Hong
Sang, Yuanhua
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Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R ChinaShandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
Sang, Yuanhua
Liu, Wei
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Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R ChinaShandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
Liu, Wei
Yu, Guangwei
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Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R ChinaShandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
Yu, Guangwei
Leng, Yanhua
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Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R ChinaShandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China