Ruddlesden-Popper phases An+1MnO3n+1: Structures and properties
Creators
- 1. Univ. of Texas, Austin (USA)
- 2. Northeastern Univ., Boston, MA (USA)
- 3. Argonne National Lab., IL (USA)
Description
The crystal and magnetic structures of (Y2Sr) (FeCu)O6.5(n=2), I, and (La1/4Sr3/4)4Fe3O9±δ (n=3), II, were investigated by single crystal x-ray diffraction, Moessbauer spectroscopy and neutron diffraction. In I Cu/Fe occupy the same crystallographic site and are coordinated to 5 oxygen ions at the apices of a pyramid. The pyramids share the apical oxygen ion to form two-dimensional layers of double pyramids perpendicular to the c-axis. The Moessbauer parameters are consistent with high-spin Fe3+ in 5-fold coordination. The Neel temperature is 265 K. Neutron powder diffraction patterns at 5 K show weak magnetic lines. In II Fe is in dimensional layer perpendicular to it. The central Fe octahedron has 1/2 of the equatorial oxygen ions missing. Oxygen intercalation and disintercalation occurs over the composition range 8.8-9.25. The Moessbauer results and details of oxygen transport are discussed
Additional details
Publishing Information
- Publisher
- American Chemical Society.
- Imprint Place
- Washington, DC (USA)
- Imprint Title
- 42nd Southeast/46th Southwest Combined Regional Meeting of the American Chemical Society
- Imprint Pagination
- 276 p.
- Journal Page Range
- p. 190, Paper Physical Chemistry 478.
Conference
- Title
- 42. Southeast and 46. Southwest combined regional meeting of the American Chemical Society (ACS).
- Dates
- 5-7 Dec 1990.
- Place
- New Orleans, LA (USA).
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 22054668
- Subject category
- S36: MATERIALS SCIENCE; S36: MATERIALS SCIENCE; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Resource subtype / Literary indicator
- Conference, Numerical Data
- Descriptors DEI
- COPPER OXIDES; CRYSTAL STRUCTURE; DOMAIN STRUCTURE; EXPERIMENTAL DATA; HIGH-TC SUPERCONDUCTORS; IRON OXIDES; LANTHANUM OXIDES; MOESSBAUER EFFECT; MONOCRYSTALS; NEUTRON DIFFRACTION; STRONTIUM OXIDES; X-RAY DIFFRACTION; YTTRIUM OXIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; COHERENT SCATTERING; COPPER COMPOUNDS; CRYSTALS; DATA; DIFFRACTION; INFORMATION; IRON COMPOUNDS; LANTHANUM COMPOUNDS; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; RARE EARTH COMPOUNDS; SCATTERING; STRONTIUM COMPOUNDS; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS
Optional Information
- Secondary number(s)
- CONF-901265--.