Modified Kondorsky Domain Reversal in Microstructured Phase‐Separated Manganites

The hole‐doped manganite (La 1 − y Pr y ) 0.67 Ca 0.33 MnO 3 (LPCMO) shows electronic phase separation between ferromagnetic metallic and anti‐ferromagnetic charge‐ordered insulating regions. In this study, (La 0.5 Pr 0.5 ) 0.67 Ca 0.33 MnO 3 (LP5CMO) microstructures were fabricated using photolithography on thin films grown on (110) NdGaO 3 (NGO) substrates. We investigated the domain reversal mechanism of these microstructures through magnetotransport measurements. Our results demonstrate that, while bulk (unpatterned) films follow the standard Kondorsky model for domain reversal, the microstructures obey a modified Kondorsky model. This difference indicates that local magnetic fields from reversed domains significantly influence the coercive field in confined geometries. Although we did not observe a strong electric field effect, this study establishes that magnetotransport measurements are a feasible method for probing the competition between shape and magnetocrystalline anisotropy in manganite microstructures, which could provide an alternative path for controlling magnetic domains at low current densities.