Structural study on Pr0.55(Ca[1-y]Sr[y])0.45MnO3 thin films on perovskite (011) substrate

TL;DR

This study investigates the structural properties of Pr0.55(Ca[1-y]Sr[y])0.45MnO3 thin films on perovskite (011) substrates, revealing differences in lattice distortion and orbital ordering between insulating and metallic phases using synchrotron diffraction.

Contribution

It provides detailed structural insights into the orbital ordering and lattice distortions in Pr-Ca-Sr-MnO3 thin films, highlighting differences from similar manganite films.

Findings

Insulating y=0.20 phase exhibits antiferro-orbital order with large lattice distortion.

Metallic y=0.40 phase shows no significant lattice distortion from the paramagnetic phase.

The y=0.20 orbital ordered phase is untwinned, contrasting with similar films.

Abstract

Structural study on the photo-switching system Pr{0.55}(Ca{1-y}Sr y){0.45}MnO3 thin films on perovskite (011) substrate has been made with synchrotron radiation diffraction experiment. The insulating phase of y=0.20 sample was found to be an antiferro-orbital ordered phase with large lattice distortion and the ferromagnetic metallic phase of y=0.40 film show no distinct lattice distortion from the paramagnetic phase, which are very similar with (Nd,Pr)0.5Sr0.5MnO3 films. A striking contrast of the orbital ordered phase of y=0.20 film to (Nd,Pr)0.5Sr0.5MnO3 films was its untwinned structure.