0.5 wt% Nb doping in SrTiO3 suppresses room-temperature plasticity across scales by raising yield stress ~50%, increasing pop-in and friction stresses, slowing creep, and producing spaced slip traces, with Sr vacancies identified as the main hindrance versus oxygen vacancies in Fe-doped samples.
Whitworth, Charged dislocations in ionic crystals, Advances in Physics 24(2) (1975) 203-304
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Dislocation-point defect interaction on plasticity across the length scale in SrTiO3
0.5 wt% Nb doping in SrTiO3 suppresses room-temperature plasticity across scales by raising yield stress ~50%, increasing pop-in and friction stresses, slowing creep, and producing spaced slip traces, with Sr vacancies identified as the main hindrance versus oxygen vacancies in Fe-doped samples.