The fabrication of layer‐by‐layer mode LaCoO₃ film by pulsed laser deposition

Abstract

The relationship between strain and growth conditions in LaCoO3 thin film was obtained to control the magnetic‐electric characteristics. The LaCoO3 thin films on the SrTiO3 substrates have been achieved by the pulsed laser deposition method, and the reflection high‐energy electron diffraction method (RHEED) was applied to monitor the growth process in situ; the layer‐by‐layer growth mode was discovered. The X‐ray diffraction and atomic force microscopy were applied to the phase analysis, and the layer thickness and the layer‐by‐layer growth mode were uncovered. Compared with the 100‐nm LaCoO3 thin films, the strain in the layer‐by‐layer ultra thin film was more controllable. The enhanced magnetic properties of the layer‐by‐layer mode ultra‐thin films could be tested in future work.

Manifold of spin states and dynamical temperature effects in LaCoO3 : Experimental and theoretical insights

“…The role of finite-size crystallites in spin-state transitions in LaCoO 3 is often neglected during analysis of the powder diffraction data, despite numerous reports on strain-induced transitions in thin films [51][52][53][54][55][56] and nanoparticles of LaCoO 3 [57]. The reduced dimensions of thin films and nanoparticles lead to a significant amount of strain, which directly affects the crystal structure of cobaltites.…”