Persistent photoinduced magnetization and hole droplets in La₀.₉Ca₀.₁MnO₃ films

Abstract

Photoinduced magnetization following a stretched exponential growth with time is observed in La₀.₉Ca₀.₁MnO₃ films exposed to near infrared light in magnetic fields of B≥0.1 mT. The magnetic irreversibility observed below 56 K between zero-field-cooled and field-cooled films is strongly influenced by illumination, giving space to a persistent magnetic state with increased ferromagnetic interactions, modified magnetic anisotropy and decrease of the blocking temperature to 5 K