Abstract
La 1-x Ba x MnO 3 thin films (0.05 ≤ x ≤ 0.2) with a tensile strain from substrate exhibit unusual film thickness dependence on the Curie temperature T C . The T C was found to increase up to room temperature with decreasing film thickness. In this study, the origin of the T C enhancement is examined by performing Hall measurements. The carrier densities of various thick films were found to be almost constant value (∼6 × 10 20 cm -3 ) at 10 K, whereas Hall mobility drastically increased, from 5 cm 2 /V s for 729-nm thick film to 50 cm 2 /V s for 24-nm thick film. These results indicate that the T C enhancement is induced by increase of carrier transfer due to lattice deformation of Mn-O-Mn networks.
Original language | English |
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Pages (from-to) | 481-484 |
Number of pages | 4 |
Journal | Applied Surface Science |
Volume | 244 |
Issue number | 1-4 |
DOIs | |
Publication status | Published - May 15 2005 |
Externally published | Yes |
Event | 12th International Conference on Solid Films and Surfaces - Hammatsu, Japan Duration: Jun 21 2004 → Jun 25 2004 |
All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Condensed Matter Physics
- Physics and Astronomy(all)
- Surfaces and Interfaces
- Surfaces, Coatings and Films