Magnetoresistance Governed by Fluctuations in Ultrasmall Ni/NiO/Co Junctions
- 4 August 1997
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 79 (5) , 933-936
- https://doi.org/10.1103/physrevlett.79.933
Abstract
Electrodeposited Ni/NiO/Co heterostructures, with cross sections , exhibit large steps of the magnetoresistance with ratios ranging from 4% to 50%. Two-level fluctuations of similar amplitude indicate that spin-dependent trapping and untrapping of electrons in the oxide barrier is the dominant effect. A hierarchical structure of the fluctuations is evidenced.
Keywords
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