Local structure analysis of (Na0.5K0.45Li0.05)NbO3 synthesized by malic acid complex solution method

A monoclinic ferroelectric phase with the space group Pm has been discovered in lead-free (Na0.5K0.45Li0.05)NbO3 solid solution ceramics synthesized by a malic acid complex solution method. At ambient temperature, the lattice parameters of this monoclinic structure were . The average and local struc...

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Bibliographic Details
Published inJapanese Journal of Applied Physics Vol. 56; no. 10S
Main Authors Yoneda, Yasuhiro, Takada, Eri, Nagai, Haruka, Kikuchi, Takeyuki, Morishita, Masao, Kobune, Masafumi
Format Journal Article
LanguageEnglish
Published The Japan Society of Applied Physics 01.10.2017
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Summary:A monoclinic ferroelectric phase with the space group Pm has been discovered in lead-free (Na0.5K0.45Li0.05)NbO3 solid solution ceramics synthesized by a malic acid complex solution method. At ambient temperature, the lattice parameters of this monoclinic structure were . The average and local structures of this monoclinic phase were analyzed by synchrotron X-ray measurements. The average structure maintained the monoclinic structure down to 20 K, although the local structure changed below room temperature. The distinct short-range order structure was found to be rhombohedral. The results demonstrate the presence of an order-disorder-type phase transition structurally bridging between the rhombohedral local structure and the low-symmetry monoclinic average structure in a (Na0.5K0.45Li0.05)NbO3 solid solution system.
ISSN:0021-4922
1347-4065
DOI:10.7567/JJAP.56.10PB07