English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Synthesis, crystal structure and magnetic properties of the Sr2Al0.78Mn1.22O5.2 anion-deficient layered perovskite

D'Hondt, H., Hadermann, J., Abakumov, A. M., Kalyuzhnaya, A. S., Rozova, M. G., Tsirlin, A. A., et al. (2009). Synthesis, crystal structure and magnetic properties of the Sr2Al0.78Mn1.22O5.2 anion-deficient layered perovskite. Journal of Solid State Chemistry, 182, 356-363. doi:10.1016/j.jssc.2008.11.002.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-2594-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0000-7554-E
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
D'Hondt, H., Author
Hadermann, J.1, Author              
Abakumov, A. M.1, Author              
Kalyuzhnaya, A. S., Author
Rozova, M. G., Author
Tsirlin, A. A.2, Author              
Nath, R.1, Author              
Tan, H., Author
Verbeeck, J., Author
Antipov, E. V., Author
Van Tendeloo, G., Author
Affiliations:
1Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
2Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              

Content

show
hide
Free keywords: Oxides; Crystal structure; Transmission electron microscopy; Electron diffraction; X-ray diffraction; Perovskite; Brownmillerite; Local structure; Oxygen deficient; EELS
 Abstract: A new layered perovskite Sr2Al0.78Mn1.22O5.2 has been synthesized by solid state reaction in a sealed evacuated silica tube. The crystal structure has been determined using electron diffraction, high-resolution electron microscopy, and high-angle annular dark field imaging and refined from X-ray powder diffraction data (space group P4/mmm, a = 3.89023(5) angstrom, c = 7.8034(1) angstrom, R-I = 0.023, R-p = 0.015). The structure is characterized by an alternation of MnO2 and (Al0.78Mn0.22)O-1.2 layers. Oxygen atoms and vacancies, as well as the Al and Mn atoms in the (Al0.78Mn0.22)O-1.2 layers are disordered. The local atomic arrangement in these layers is suggested to consist of short fragments of brownmillerite-type tetrahedral chains of corner-sharing AlO4 tetrahedra interrupted by MnO6 octahedra, at which the chain fragments rotate over 90 degrees. This results in an averaged tetragonal symmetry. This is confirmed by the valence state of Mn measured by EELS. The relationship between the Sr2Al0.78Mn1.22O5.2 tetragonal perovskite and the parent Sr2Al1.07Mn0.93O5 brownmillerite is discussed. Magnetic susceptibility measurements indicate spin glass behavior of Sr2Al0.78Mn1.22O5.2. The lack of long-range magnetic ordering contrasts with Mn-containing brownmillerites and is likely caused by the frustration of interlayer interactions due to presence of the Mn atoms in the (Al0.78Mn0.22)O-1.2 layers. (C) 2008 Elsevier Inc. All rights reserved.

Details

show
hide
Language(s): eng - English
 Dates: 2009
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 404354
ISI: 000263124700022
DOI: 10.1016/j.jssc.2008.11.002
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Journal of Solid State Chemistry
  Alternative Title : J. Solid State Chem.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 182 Sequence Number: - Start / End Page: 356 - 363 Identifier: ISSN: 0022-4596