Epitaxial Stabilization and Persistent Nucleation of the 3C Polymorph of Ba_0.6Sr_0.4MnO₃.

ABSTRACT: Ba-rich compositions in the Ba_xSr_1-xMnO₃ (BSMO) cubic perovskite (3C) system are magnetic ferroelectrics and are of interest for their strong magnetoelectric coupling. Beyond x = 0.5, they only form in hexagonal polymorphs. Here, the 3C phase boundary is pushed to Ba_0.6Sr_0.4MnO₃ for the thin films. Using regular pulsed laser deposition (rPLD), 3C Ba_0.6Sr_0.4MnO₃ could be epitaxially stabilized on DyScO₃ (101)_o substrates by using a 0.1% O₂/99.9% N₂ gas mixture. However, the 3C phase was mixed with the 4H polymorph for films 24 nm thick and above, and the films were relatively rough. To improve flatness and phase purity, changes i

SUBMITTER: Zhou C 

PROVIDER: S-EPMC10835664 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature