1/f electrical noise in epitaxial thin films of the manganite oxides La0.67Ca0.33MnO3 and Pr0.67Sr0.33MnO3

Publication Type
Journal Article
Authors
DOI
10.1063/1.117913
Abstract
We report measurements of 1/f electrical noise in two hole doped manganite perovskite oxides, La0.67Ca0.33MnO3 and Pr0.67Sr0.33MnO3, which exhibit colossal magnetoresistance. The noise magnitude represented by the Hooge parameter is nearly 8 orders of magnitude larger than that observed in ordinary metals (and semiconductors) and nearly 5-6 orders of magnitude larger than that observed in epitaxial films of the perovskite oxide YBa2Cu3O7 in the normal state. The normalized noise spectral density increases with decreasing temperature below the resistivity peak, suggestive of the presence of additional low energy noise processes in the ferromagnetic metallic state. © 1996 American Institute of Physics.
Notes
cited By 50
Journal
Applied Physics Letters
Volume
69
Year of Publication
1996
Number
6
Pagination
851-853
Publisher
American Institute of Physics Inc.
ISSN Number
00036951
Research Areas
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