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The effect of grain size on electrical transport and magnetic properties of La0.9Te0.1MnO3
- Publication Year :
- 2004
-
Abstract
- The effect of grain size on structural, magnetic and transport properties in electron-doped manganites La0.9Te0.1MnO3 has been investigated. All samples show a rhombohedral structure with the space group at room temperature. It shows that the Mn-O-Mn bond angle decreases and the Mn-O bond length increases with the increase of grain size. All samples undergo paramagnetic (PM)-ferromagnetic (FM) phase transition and an interesting phenomenon that both magnetization and the Curie temperature decrease with increasing grain size is observed, which is suggested to mainly originate from the increase of the Mn-O bond length . Additionally, obviously increases with decreasing grain size due to the increase of both the height and width of tunneling barriers with decreasing the grain size. The results indicate that both the intrinsic colossal magnetoresistance (CMR) and the extrinsic the extrinsic interfacial magnetoresistance (IMR) can be effectively tuned in La0.9Te0.1MnO3 by changing grain size.<br />15 pages,4 figures. Solid state communications 132(2004)83-87
- Subjects :
- Condensed Matter - Materials Science
Colossal magnetoresistance
Materials science
Condensed matter physics
Magnetoresistance
Strongly Correlated Electrons (cond-mat.str-el)
Materials Science (cond-mat.mtrl-sci)
FOS: Physical sciences
General Chemistry
Condensed Matter Physics
Grain size
Bond length
Magnetization
Paramagnetism
Condensed Matter - Strongly Correlated Electrons
Materials Chemistry
Curie temperature
Grain boundary
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....22ca96447e5219ebf8191cc6e343336d