Mesoscopic and microscopic phase segregation in manganese perovskites - art. no. 172419

Mesoscopic (500-2000 Angstrom) and microscopic (5-20 Angstrom) phase segreg ation with temperature and magnetic field was studied in the model manganit e Pr0.7Ca0.3MnO3 by high-resolution neutron diffraction and inelastic neutr on scattering. Intragranular strain-driven mesoscopic segregation between t wo insulating phases, one of which is charge ordered (CO), sets in below th e CO temperature in zero field. The CO phase orders antiferromagnetically, while the other insulating phase shows spin-glass behavior. After field-ind uced metallization, the CO phase coexists with a ferromagnetic metallic pha se.