RT Journal Article
T1 Perturbed Angular Correlation Studies in SrTi0₃ Single Crystals
A1 Presa Muñoz De Toro, Patricia Marcela De La
A1 Lieb, K. P.
A1 Uhrmacher, M.
A1 Ziegeler, L.
AB The quadrupole hyperfine interactions of ^111Cd/^111 probe nuclei in single-crystalline SrTiO₃ perovskite samples were investigated using Perturbed Angular Correlation spectroscopy. Three electric field gradients were detected and their fractions and hyperfine parameters were measured in the temperature range from 26 to 700 K. The fraction f₀ having a vanishing quadrupole frequency, as expected for ^111Cd on substitutional sites in a cubic lattice, starts to develop around 300 K and reaches 100% at 700 K. Two well-defined EFG's having closely lying quadrupole frequencies and asymmetry parameters of ω_(Q1) = 49.1(3) Mrad/s, η_(1) = 0.10(2) and ω_(Q2) = 51 8(3) Mrad/s, η_(2)= 0.12(2), at room temperature, were identified in the temperature range from 250 to 530 K, and their (100) orientation in the lattice was determined. They are associated with electronic defects at the probe atoms.
PB Verlag Z Naturforsch
SN 0932-0784
YR 2000
FD 2000-01
LK https://hdl.handle.net/20.500.14352/60213
UL https://hdl.handle.net/20.500.14352/60213
LA eng
NO © Verlag der Zeitschrift für Naturforschung.International Symposium on Nuclear Quadrupole Interactions (XVth NQI 99) (15. 1999. Leipzig, Germany).This work has been supported by the Deutsche Forschungsgemeinschaft, Bonn.
NO Deutsche Forschungsgemeinschaft
DS Docta Complutense
RD 9 abr 2025