An alternative interpretation of Moessbauer spectra for 57Fe-doped lanthanum calcium manganite
- 1. Australian Defence Force Academy, Canberra, ACT (Australia). The University of New South Wales, School of Physical, Environmental and Mathematical Sciences
- 2. Monash University, Clayton, VIC (Australia). School of Physics and Materials Engineering
Description
Full text: La2/3Ca1/3MnO3 is the generic colossal magnetoresistance material with an insulator-metallic transition temperature of about 273 K. In this work, Moessbauer spectroscopy is used to probe its Mn sub-lattice magnetisation via a 0.5 at % substitution of Mn atoms with enriched 57Fe. Relaxation effects are successfully interpreted in terms of slowly fluctuating magnetic clusters according to a model devised elsewhere for the analysis of iron oxide spectra. Smaller, faster relaxing clusters are represented as a paramagnetic component of the spectra. The derived temperature dependence of the Mn sub-lattice magnetisation is compared with results obtained using other interpretations and other measurement techniques. Copyright (2005) Australian Institute of Physics
Additional details
Identifiers
Publishing Information
- Imprint Title
- 16th National Congress of the Australian Institute of Physics. Congress Proceedings Handbook and Abstracts
- Imprint Pagination
- 268 p.
- Journal Page Range
- p. 193
Conference
- Title
- 16. National Congress of the Australian Institute of Physics. Physics for the Nation
- Dates
- 30 Jan - 4 Feb 2005
- Place
- Canberra, ACT (Australia)
INIS
- Country of Publication
- Australia
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 37101822
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Resource subtype / Literary indicator
- Conference, Non-conventional Literature
- Descriptors DEI
- ABSORPTION SPECTRA; ATOMS; CALCIUM COMPOUNDS; DOPED MATERIALS; IRON 57; IRON OXIDES; LANTHANUM COMPOUNDS; MAGNETIZATION; MAGNETORESISTANCE; MANGANATES; MOESSBAUER EFFECT; PARAMAGNETISM; RELAXATION; TEMPERATURE DEPENDENCE; TRANSITION TEMPERATURE
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; EVEN-ODD NUCLEI; INTERMEDIATE MASS NUCLEI; IRON COMPOUNDS; IRON ISOTOPES; ISOTOPES; MAGNETISM; MANGANESE COMPOUNDS; MATERIALS; NUCLEI; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; SPECTRA; STABLE ISOTOPES; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS