Magnetic non-uniformity and thermal hysteresis of magnetism in a manganite thin film

Abstract

We measured the chemical and magnetic depth profiles of a single crystalline (La${}_{1-x}$Pr${}_x$)${}_{1-y}$Ca${}_y$MnO${}_{3-\delta }$ (x = 0.52\pm0.05, y = 0.23\pm0.04, δ = 0.14\pm0.10) film grown on a NdGaO3 substrate using x-ray reflectometry, electron microscopy, electron energy-loss spectroscopy and polarized neutron reflectometry. Our data indicate that the film exhibits coexistence of different magnetic phases as a function of depth. The magnetic depth profile is correlated with a variation of chemical composition with depth. The thermal hysteresis of ferromagnetic order in the film suggests a first order ferromagnetic transition at low temperatures.

References in corpus (3)

• Nearly total spin polarization in La2/3Sr1/3MnO3 from tunneling experiments
• Effect of strain and electric field on the electronic soft matter in manganite thin films
• Single domain to multi-domain transition due to in-plane magnetic anisotropy in phase separated (La${}_{0.4}$Pr${}_{0.6}$)${}_{0.67}$Ca${}_{0.33}$MnO${}_3$ thin films

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