Published October 15, 2003
| Version v1
Journal article
Non-adiabatic small polaron hopping in the n = 3 Ruddlesden-Popper compound Ca4Mn3O10
- 1. Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR (United Kingdom)
- 2. Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU (United Kingdom)
Description
Magnetotransport properties of the compound Ca4Mn3O10 are interpreted in terms of activated hopping of small magnetic polarons in the non-adiabatic regime. Polarons are most probably formed around Mn3+ sites created by oxygen sub-stoichiometry. The application of an external field reduces the size of the magnetic contribution to the hopping barrier and thus produces an increase in the conductivity. We argue that the change in the effective activation energy around TN is due to the crossover to variable range hopping conduction as antiferromagnetic order sets in
Availability note (English)
Available online at http://stacks.iop.org/0953-8984/15/6817/cm3_40_018.pdf or at the Web site for the Journal of Physics. Condensed Matter (ISSN 1361-648X) http://www.iop.org/Additional details
Identifiers
- URL
- http://stacks.iop.org/0953-8984/15/6817/cm3_40_018.pdf; http://www.iop.org/;
- DOI
- 10.1088/0953-8984/15/40/018;
- PII
- S0953-8984(03)64839-3;
Publishing Information
- Journal Title
- Journal of Physics. Condensed Matter
- Journal Volume
- 15
- Journal Issue
- 40
- Journal Page Range
- p. 6817-6833
- ISSN
- 0953-8984
- CODEN
- JCOMEL
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 35018482
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- ANTIFERROMAGNETISM; CALCIUM COMPOUNDS; MAGNETORESISTANCE; MANGANATES; MANGANESE IONS; POLARONS
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CHARGED PARTICLES; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; IONS; MAGNETISM; MANGANESE COMPOUNDS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; QUASI PARTICLES; TRANSITION ELEMENT COMPOUNDS