2024-03-29T07:28:05Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00005528
2023-01-16T04:30:10Z
320:321:322
Magnetotransport in perovskite series La_{n-nx}Ca_{1+nx}Mn_nO_{3n+1} ferromagnets
Asano, H.
Hayakawa, J.
Matsui, M.
open access
Copyright: American Physical Society, All rights reserved.
The perovskite series La_{n-nx}Ca_{1+nx}Mn_nO_{3n+1}(n=2,3,and ∞)composed of n layers of MnO2 is a colossal magnetoresistance (CMR) ferromagnet. Results on the transport properties of epitaxial a-axis thin-film samples with a fixed carrier concentration (x=0.3) have indicated that a reduction in the number of layers results in systematic changes in the various features. These include an increase in resistivity, a decrease in the resistivity peak temperature Tρc corresponding to the metal-insulator transition, an enhancement of the maximum MR near Tρc, and an increase in the low-temperature intrinsic MR. In order to explain the variation in these features with the number of MnO2 layers, it is necessary to take both c-axis transfer interaction and two-dimensional spin fluctuation into account.
The American Physical Society
1998-01
eng
journal article
VoR
http://hdl.handle.net/2237/7134
https://nagoya.repo.nii.ac.jp/records/5528
https://doi.org/10.1103/PhysRevB.57.1052
1098-0121
Physical Review B
57
2
1052
1056
https://nagoya.repo.nii.ac.jp/record/5528/files/p1052_1.pdf
application/pdf
126.9 kB
2018-02-19