MAGNETORESISTANCE GOVERNED BY FLUCTUATIONS IN ULTRASMALL NI NIO/CO JUNCTIONS/

Authors
DOUDIN B REDMOND G GILBERT SE ANSERMET JP
Citation
B. Doudin et al., MAGNETORESISTANCE GOVERNED BY FLUCTUATIONS IN ULTRASMALL NI NIO/CO JUNCTIONS/, Physical review letters, 79(5), 1997, pp. 933-936
Citations number
30
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
79
Issue
5
Year of publication
1997
Pages
933 - 936
Database
ISI
SICI code
0031-9007(1997)79:5<933:MGBFIU>2.0.ZU;2-A
Abstract
Electrodeposited Ni/NiO/Co heterostructures, with cross sections < 0.0 1 mu m(2), exhibit large steps of the magnetoresistance with ratios ra nging from 4% to 50%. Two-level fluctuations of similar amplitude indi cate that spin-dependent trapping and untrapping of electrons in the o xide barrier is the dominant effect. A hierarchical structure of the f luctuations is evidenced.