TY - JOUR
T1 - Static and dynamic aspects of perturbed angular correlation measurements in perovskite crystals
AU - Yeshurun, Y.
AU - Havlin, S.
AU - Schlesinger, Y.
PY - 1978/7
Y1 - 1978/7
N2 - The static and dynamic aspects of the Electric Field Gradient (EFG) in ionic perovskite (anti-) ferroelectric crystals have been studied with particular emphasis on the Perturbed Angular Correlation method. We analyze the effect of the lattice fluctuations on the temperature behavior of the EFG. The proper averaging procedure of the perturbation function is outlined. This results in a simple relationship between the electric (sub-) lattice susceptibility and the measured EFG, predicting a critical behavior of EFG on approaching Tc. In addition to this dynamical effect we show that well below Tc, the temperature dependence of EFG is dominated by Ps2, the square of the spontaneous polarization of the (sub-) lattice. These predictions are shown to be in qualitative agreement with published experimental data.
AB - The static and dynamic aspects of the Electric Field Gradient (EFG) in ionic perovskite (anti-) ferroelectric crystals have been studied with particular emphasis on the Perturbed Angular Correlation method. We analyze the effect of the lattice fluctuations on the temperature behavior of the EFG. The proper averaging procedure of the perturbation function is outlined. This results in a simple relationship between the electric (sub-) lattice susceptibility and the measured EFG, predicting a critical behavior of EFG on approaching Tc. In addition to this dynamical effect we show that well below Tc, the temperature dependence of EFG is dominated by Ps2, the square of the spontaneous polarization of the (sub-) lattice. These predictions are shown to be in qualitative agreement with published experimental data.
UR - http://www.scopus.com/inward/record.url?scp=0017991619&partnerID=8YFLogxK
U2 - 10.1016/0038-1098(78)90827-X
DO - 10.1016/0038-1098(78)90827-X
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AN - SCOPUS:0017991619
SN - 0038-1098
VL - 27
SP - 181
EP - 184
JO - Solid State Communications
JF - Solid State Communications
IS - 2
ER -