Abstract
By using high-resolution time-of-flight neutron powder diffraction, we have investigated phase segregation in the narrow-bandwidth manganite Pr
0.7Ca
0.3MnO
3. Unexpectedly, our data clearly demonstrate that phase segregation in Pr
0.7Ca
0.3MnO
3 is unrelated to electronic phase segregation, but is primarily driven by chemical disorder and intra-granular strains, similar to martensitic phase transitions.