Published January 2000
| Version v1
Journal article
Enhancement of magnetoresistance in cobaltites by manganese substitution: the oxide La0.8Sr0.2Co1-xMnxO3
Description
The substitution of manganese for cobalt in the perovskite La0.8Sr0.2CoO3 has been studied. A significant increase of the magnetoresistance (MR) is obtained, MR=-100(ρH-ρ0)/ρ0 reaching 60% at 5 K under 7 T for x≅0.10. This behavior originates from a spectacular increase of the resistivity correlated to a significant decrease of ferromagnetism by Mn doping. This enhancement of magnetoresistance can be interpreted by the growth of ferromagnetic clusters in the insulating matrix, by applying a magnetic field. (orig.)
Additional details
Publishing Information
- Journal Title
- European Physical Journal. B, Condensed Matter Physics
- Journal Volume
- 13
- Journal Issue
- 1
- Journal Page Range
- p. 41-45
- ISSN
- 1434-6028
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 31013442
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- COBALT OXIDES; DOPED MATERIALS; ELECTRICAL INSULATORS; ELECTRON DIFFRACTION; FERROMAGNETIC MATERIALS; LANTHANUM COMPOUNDS; MAGNETIC SUSCEPTIBILITY; MAGNETIZATION; MAGNETORESISTANCE; MANGANESE OXIDES; PEROVSKITE; PHASE TRANSFORMATIONS; STRONTIUM COMPOUNDS; TRANSMISSION ELECTRON MICROSCOPY
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; COBALT COMPOUNDS; COHERENT SCATTERING; DIFFRACTION; ELECTRIC CONDUCTIVITY; ELECTRICAL EQUIPMENT; ELECTRICAL PROPERTIES; ELECTRON MICROSCOPY; EQUIPMENT; MAGNETIC MATERIALS; MAGNETIC MOMENTS; MAGNETIC PROPERTIES; MANGANESE COMPOUNDS; MATERIALS; MICROSCOPY; MINERALS; OXIDE MINERALS; OXIDES; OXYGEN COMPOUNDS; PEROVSKITES; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; SCATTERING; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Notes
- 20 refs.