Title
|
|
|
|
Artificial construction of the layered Ruddlesden-Popper manganite by reflection high energy electron diffraction monitored pulsed laser deposition
| |
Author
|
|
|
|
| |
Abstract
|
|
|
|
Pulsed laser deposition has been used to artificially construct the n = 3 Ruddlesden Popper structure La2Sr2Mn3O10 in epitaxial thin film form by sequentially layering La1-xSrxMnO3 and SrO unit cells aided by in situ reflection high energy electron diffraction monitoring. The interval deposition technique was used to promote two-dimensional SrO growth. X-ray diffraction and cross-sectional transmission electron microscopy indicated that the trilayer structure had been formed. A site ordering was found to differ from that expected thermodynamically, with the smaller Sr2+ predominantly on the R site due to kinetic trapping of the deposited cation sequence. A dependence of the out-of-plane lattice parameter on growth pressure was interpreted as changing the oxygen content of the films. Magnetic and transport measurements on fully oxygenated films indicated a frustrated magnetic ground state characterized as a spin glass-like magnetic phase with the glass temperature T-g approximate to 34 K. The magnetic frustration has a clear in-plane (ab) magnetic anisotropy, which is maintained up to temperatures of 150 K. Density functional theory calculations suggest competing antiferromagnetic and ferromagnetic long-range orders, which are proposed as the origin of the low-temperature glassy state. |
| |
Language
|
|
|
|
English
| |
Source (journal)
|
|
|
|
Journal of the American Chemical Society. - Washington, D.C., 1879, currens
| |
Publication
|
|
|
|
Washington, D.C.
:
American Chemical Society
,
2012
| |
ISSN
|
|
|
|
0002-7863
| |
DOI
|
|
|
|
10.1021/JA211138X
| |
Volume/pages
|
|
|
|
134
:18
(2012)
, p. 7700-7714
| |
ISI
|
|
|
|
000303696200029
| |
Full text (Publisher's DOI)
|
|
|
|
| |
|