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Defect Structure and Dielectric Properties of Nd 2 O 3 ‐Modified BaTiO 3
Author(s) -
SHAIKH AZIZ S.,
VEST ROBERT W.
Publication year - 1986
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1986.tb07472.x
Subject(s) - dielectric , barium titanate , materials science , barium , curie temperature , neodymium , titanium , analytical chemistry (journal) , mineralogy , chemistry , condensed matter physics , laser , metallurgy , optics , optoelectronics , physics , ferromagnetism , chromatography
The defect structure and dielectric properties of BaTiO 3 with 1 to 10 mol% Nd 2 O 3 additions were studied. The results indicated that neodymium occupies the barium site and charge compensation takes place by creation of titanium vacancies. The dependence of inverse electric susceptibility, spontaneous polarization, and specific heat on temperature for samples containing more than 2 mol% of Nd 2 O 3 were characteristic of a diffuse transformation resulting from a disordering of defects. The addition of Nd2O3 leads to a very drastic sfiift in the Curie temperature ( Tc ) of BaTiO 3 ; 3 mel% Nd 2 O 3 addition moves Tc below room temperature.