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K
Li
)NbO
synthesized by malic acid complex solution methodYoneda, Yasuhiro; Takada, Eri*; Nagai, Haruka*; Kikuchi, Takeyuki*; Morishita, Masao*; Kobune, Masafumi*
Japanese Journal of Applied Physics, 56(10S), p.10PB07_1 - 10PB07_7, 2017/10
Times Cited Count：3 Percentile：14.94(Physics, Applied)A monoclinic phase was discovered in (NaKLi)NbO solid solution ceramics grown by a malic acid complex solution method. The average and local structures of this monoclinic phase were analyzed by synchrotron X-ray measurements. The local structure can be reproduced by assuming a rhombohedral model, that is the same local structure of KNbO. The results demonstrate that the monoclinic average structure is observed as a disordered rhombohedral structure.
Yoneda, Yasuhiro
no journal, ,
A lecture will be given on nano-scale structural analysis of ferroelectric materials using atomic pair-distribution function obtained by synchrotron high-energy X-rays. The results of local structure analyses to relaxor ferroelectrics and potassium niobate nanocrystals are discussed.
KLi)NbO-based system with tetragonal structureYoneda, Yasuhiro; Takuwa, Chihaya*
no journal, ,
Nb
)OYoneda, Yasuhiro; Taniguchi, Hiroki*; Noguchi, Yuji*
no journal, ,
Many structural models have been proposed for relaxer ferroelectrics Pb(MgNb
O. We have shown that the Pb-O distance obtained from the mean structure differs from the Pb-O distance obtained from the X-ray absorption fine structure (XAFS). Since the deviation between the average structure and the local structure is considered to be derived from the characteristic environment of the Pb atom, the behavior similar to that of the Pb atom in the pyrochlore type Pb
SnO
is assumed and the local structure is assumed. I tried structural modeling. A pair-distribution function (PDF) analysis was performed, and as a result of local structure modeling, it was suggested that there is a network structure of Pb atoms that is different from the periodicity of the lattice system.
