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.
|ジャーナル||Applied Surface Science|
|出版ステータス||出版済み - 5月 15 2005|
|イベント||12th International Conference on Solid Films and Surfaces - Hammatsu, 日本|
継続期間: 6月 21 2004 → 6月 25 2004
!!!All Science Journal Classification (ASJC) codes
- 化学 (全般)