Premium
Study of the electric quadrupole interaction (EQI) in (Pb 0.925 Ba 0.075 )ZrO 3 by perturbed angular correlations
Author(s) -
Saitovitch H.,
Fechner J. B.
Publication year - 1975
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220690234
Subject(s) - antiferroelectricity , condensed matter physics , ferroelectricity , quadrupole , phase transition , materials science , electric field , electric field gradient , phase (matter) , hysteresis , discontinuity (linguistics) , dielectric , analytical chemistry (journal) , physics , chemistry , atomic physics , mathematical analysis , mathematics , optoelectronics , quantum mechanics , chromatography
The EQI in polycristalline (Pb 0.925 Ba 0.075 )ZrO 3 has been investigated in the temperature range 22 to 240 to 22 °C by time differential perturbed angular correlation measurements. For the application of this technique (Pb 0.925 Ba 0.075 )ZrO 3 was doped with small amounts of radioactive Hf 181 . According to the crystal structure studies this compound exhibits phase transitions at 175 °C (antiferroelectric → ferroelectric) and at ≈205 °C (ferroelectric → paraelectric); it exhibits also a large temperature hysteresis at the lower transition. It is shown that the electric field gradient (EFG) exhibits a sharp discontinuity at approximately 170 °C, corresponding to the first phase transition, and a slightly sharp discontinuity at approximately 200 °C, corresponding to the second phase transition. In the cubic phase a remaining EFG is observed, which is probably caused by lattice imperfections in the source. No any variation of the EFG following the hysteresis loop is found.