skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Oxygen octahedral distortions in LaMO 3/SrTiO 3 superlattices

Abstract

Here we study the interfaces between the Mott insulator LaMnO 3 (LMO) and the band insulator SrTiO 3 (STO) in epitaxially grown superlattices with different thickness ratios and different transport and magnetic behaviors. Using atomic resolution electron energy-loss spectrum imaging, we analyze simultaneously the structural and chemical properties of these interfaces. We find changes in the oxygen octahedral tilts within the LaMnO 3 layers when the thickness ratio between the manganite and the titanate layers is varied. Superlattices with thick LMO and ultrathin STO layers present unexpected octahedral tilts in the STO, along with a small amount of oxygen vacancies. On the other hand, thick STO layers exhibit undistorted octahedra while the LMO layers present reduced O octahedral distortions near the interfaces. In conclusion, these findings will be discussed in view of the transport and magnetic differences found in previous studies.

Authors:
 [1];  [1];  [2];  [1];  [1];  [3];  [1]
  1. Univ. Complutense de Madrid, Madrid (Spain)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. Complutense de Madrid, Madrid (Spain)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1162066
Grant/Contract Number:  
AC05-00OR22725; MAT2011-27470-C02; S2009/MAT-1756; 239739 STEMOX
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Microscopy and Microanalysis
Additional Journal Information:
Journal Volume: 20; Journal Issue: 03; Journal ID: ISSN 1431-9276
Publisher:
Microscopy Society of America (MSA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; scanning transmission electron microscopy; electron energy loss spectroscopy; complex oxides; spectrum imaging; manganites; oxygen octahedral tilts; oxygen vacancies

Citation Formats

Sanchez-Santolino, Gabriel, Cabero, Mariona, Varela, Maria, Garcia-Barriocanal, Javier, Leon, Carlos, Pennycook, Stephen J., and Santamaria, Jacobo. Oxygen octahedral distortions in LaMO3/SrTiO3 superlattices. United States: N. p., 2014. Web. doi:10.1017/S1431927614000750.
Sanchez-Santolino, Gabriel, Cabero, Mariona, Varela, Maria, Garcia-Barriocanal, Javier, Leon, Carlos, Pennycook, Stephen J., & Santamaria, Jacobo. Oxygen octahedral distortions in LaMO3/SrTiO3 superlattices. United States. doi:10.1017/S1431927614000750.
Sanchez-Santolino, Gabriel, Cabero, Mariona, Varela, Maria, Garcia-Barriocanal, Javier, Leon, Carlos, Pennycook, Stephen J., and Santamaria, Jacobo. Thu . "Oxygen octahedral distortions in LaMO3/SrTiO3 superlattices". United States. doi:10.1017/S1431927614000750. https://www.osti.gov/servlets/purl/1162066.
@article{osti_1162066,
title = {Oxygen octahedral distortions in LaMO3/SrTiO3 superlattices},
author = {Sanchez-Santolino, Gabriel and Cabero, Mariona and Varela, Maria and Garcia-Barriocanal, Javier and Leon, Carlos and Pennycook, Stephen J. and Santamaria, Jacobo},
abstractNote = {Here we study the interfaces between the Mott insulator LaMnO3 (LMO) and the band insulator SrTiO3 (STO) in epitaxially grown superlattices with different thickness ratios and different transport and magnetic behaviors. Using atomic resolution electron energy-loss spectrum imaging, we analyze simultaneously the structural and chemical properties of these interfaces. We find changes in the oxygen octahedral tilts within the LaMnO3 layers when the thickness ratio between the manganite and the titanate layers is varied. Superlattices with thick LMO and ultrathin STO layers present unexpected octahedral tilts in the STO, along with a small amount of oxygen vacancies. On the other hand, thick STO layers exhibit undistorted octahedra while the LMO layers present reduced O octahedral distortions near the interfaces. In conclusion, these findings will be discussed in view of the transport and magnetic differences found in previous studies.},
doi = {10.1017/S1431927614000750},
journal = {Microscopy and Microanalysis},
number = 03,
volume = 20,
place = {United States},
year = {Thu Apr 24 00:00:00 EDT 2014},
month = {Thu Apr 24 00:00:00 EDT 2014}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

STEM-EELS imaging of complex oxides and interfaces
journal, January 2012

  • Varela, Maria; Gazquez, Jaume; Pennycook, Stephen J.
  • MRS Bulletin, Vol. 37, Issue 01, p. 29-35
  • DOI: 10.1557/mrs.2011.330

Mapping chemical and bonding information using multivariate analysis of electron energy-loss spectrum images
journal, October 2006


Tunable Quasi-Two-Dimensional Electron Gases in Oxide Heterostructures
journal, September 2006


Epitaxial BiFeO3 Multiferroic Thin Film Heterostructures
journal, March 2003