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Room temperature ferromagnetism in metallic and insulating (In1−xFex)2O3 thin films
- Source :
- Journal of Applied Physics. 109:053907
- Publication Year :
- 2011
- Publisher :
- AIP Publishing, 2011.
-
Abstract
- Fe-doped In2O3 thin films are deposited on sapphire substrates using pulsed laser ablation. The effects of Fe concentration and oxygen partial pressure on the structure, magnetism and transport properties of (In1−xFex)2O3 films are studied systematically. A detailed analysis of the structural properties suggests the substitution of Fe dopant ions with mixture valences and rules out the presence of clusters and secondary phases as the source of ferromagnetism. Systematic investigations of transport properties for (In1−xFex)2O3 films with a wide range of carrier densities reveal that they occur in both metallic and insulating regimes. The insulating films exhibit variable range hopping at low temperatures and show temperature dependent ferromagnetism, which can be explained by bound magnetic polarons mechanism. For the metallic films, the carrier densities play a crucial role in their robust ferromagnetism and the resistivity and magnetization are independent of temperature; the carrier-mediated exchange me...
- Subjects :
- Condensed Matter::Materials Science
Magnetization
Materials science
Dopant
Condensed matter physics
Ferromagnetism
Magnetism
Electrical resistivity and conductivity
General Physics and Astronomy
Condensed Matter::Strongly Correlated Electrons
Magnetic semiconductor
Thin film
Variable-range hopping
Subjects
Details
- ISSN :
- 10897550 and 00218979
- Volume :
- 109
- Database :
- OpenAIRE
- Journal :
- Journal of Applied Physics
- Accession number :
- edsair.doi...........527fc33d0abbfdfb8fe88606a95e759e