Abstract
Doping with manganese is one of several ways to confine the electrons to a small region. In Mn-doped BaTiO3 the phenomenon, which suggests reconstruction of ferroelectric domains, such as an aging effect, has been observed. The valence state of the substituted Mn was found to be +4 by using X-ray absorption fine structure measurements. We also performed high-energy synchrotron X-ray measurements and revealed that the coherence length of local structure increased with Mn substitution. This is a kind of phase transformation from a short-range order to long-range order type of ferroelectrics.
