Printed in the United States . NON - STOICHIOMETRY AND OPTICAL SPECTRA OF Nd ( III ) SUBSTITUTED PbTiO 3
نویسنده
چکیده
A B S T R A C T The non-stoichiometry of the perovskite (ABO3)-type phase in the system PbO-TiO2-Nd203 has been studied. Monophasic compounds of composition Pbl_~xNdxTiO3+x( 1 5_e) with x ~ 0.21 and 0.09 ~ e ~ 1.5 were prepared. The'zerroelectric Curie temperature (T c) shows a decrease of 18.5 K/at% Nd with increasing value of x. T c shows an increase of 3.5 K/mol % PbO with decreasing value of (increasing content of PbO). The observed effect of on optical spectra can be interpreted by assuming that Nd(III) ions partly occupy B sites in compounds with < 1.5.
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