Title | Thickness-Dependent Double-Epitaxial Growth in Strained SrTiCoO Films. |
Publication Type | Journal Article |
Year of Publication | 2018 |
Authors | Tang AS, Onbasli MC, Sun X, Ross CA |
Journal | ACS Appl Mater Interfaces |
Volume | 10 |
Issue | 8 |
Pagination | 7469-7475 |
Date Published | 2018 Feb 28 |
ISSN | 1944-8252 |
Abstract | Perovskite-structured SrTiCoO (STCo) films of varying thicknesses were grown on SrTiO(001) substrates using pulsed laser deposition. Thin films grow with a cube-on-cube epitaxy, but for films exceeding a critical thickness of about 120 nm, a double-epitaxial microstructure was observed, in which (110)-oriented crystals nucleated within the (001)-oriented STCo matrix, both orientations being epitaxial with the substrate. The crystal structure, strain state, and magnetic properties are described as a function of film thickness. Both the magnetic moment and the coercivity show maxima at the critical thickness. The formation of a double-epitaxial microstructure provides a mechanism for strain relief in epitaxially mismatched films. |
DOI | 10.1021/acsami.7b18808 |
Alternate Journal | ACS Appl Mater Interfaces |
PubMed ID | 29442494 |
Submitted by kej2006 on June 6, 2018 - 4:13pm