Effect of chemical state and occupation site of RE (RE = Yb, Y, Eu, Sm, Nd) on crystal structure and optical property of BaCe1-xRExO3-δ —Analyses of origin of peculiar crystal structure and property of BaCe1-xNdxO3-δ
文摘
Crystal structures of various BaCe1-xRExO3-δ (RE: rare earth) have been clarified. The structure varies by RE3+ substitution involving increase of δ except for RE = Nd. The unique crystal structure and thermal expansion were observed for BaCe1-xNdxO3-δ. Existence of Nd4+ can be an origin of the unique crystal structure and property. Partial Nd3+ mixing for Ba-site in BaCe1-xNdxO3-δ was proposed by optical spectra.