title: Strain and interface effects in a novel bismuth-based self-assembled supercell structure.
abstract: Bi2FeMnO6 (BFMO) thin films with both conventional pseudocubic structure and novel supercell structure have been grown on SrTiO3 (001) substrates with different thicknesses of CeO2 buffer layers (ranging from 6.7 to 50.0 nm) using pulsed laser deposition. The correlation between the thickness of the CeO2 buffer layer and the structure of the BFMO films shows that the CeO2 buffer layer, as thin as 6.7 nm, is sufficient in triggering the novel BFMO supercell structure. This may be ascribed to the interfacial strain between the BFMO supercell structure and the CeO2 buffer layer which also serves as a seed layer. The buffer layer thickness is found to be critical to control the microstructure and magnetism of the formed BFMO supercell structures. Thin seed layers can produce a smoother interface between the BFMO film and the CeO2 buffer layer, and therefore better ferrimagnetic properties. Our results have demonstrated that strain and interface could be utilized to generate novel thin film structures and to tune the functionalities of thin films.
authors.forename: Leigang
authors.initials: L
authors.lastname: Li
authors.forename: Wenrui
authors.initials: W
authors.lastname: Zhang
authors.forename: Fauzia
authors.initials: F
authors.lastname: Khatkhatay
authors.forename: Jie
authors.initials: J
authors.lastname: Jian
authors.forename: Meng
authors.initials: M
authors.lastname: Fan
authors.forename: Qing
authors.initials: Q
authors.lastname: Su
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Zhu
authors.forename: Aiping
authors.initials: A
authors.lastname: Chen
authors.affiliation: §Sandia National Laboratory, Albuquerque, New Mexico 87185, United States.
authors.forename: Ping
authors.initials: P
authors.lastname: Lu
authors.forename: Xinghang
authors.initials: X
authors.lastname: Zhang
authors.forename: Haiyan
authors.initials: H
authors.lastname: Wang
keywords: ferrimagnetic; interface; layered oxides; strain; supercell; thin film