ARRAYS OF MULTILAYERED NANOWIRES

Citation
B. Doudin et al., ARRAYS OF MULTILAYERED NANOWIRES, Journal of applied physics, 79(8), 1996, pp. 6090-6094
Citations number
18
Categorie Soggetti
Physics, Applied
Journal title
ISSN journal
00218979
Volume
79
Issue
8
Year of publication
1996
Part
2B
Pages
6090 - 6094
Database
ISI
SICI code
0021-8979(1996)79:8<6090:AOMN>2.0.ZU;2-#
Abstract
Multilayered Co/Cu wires with a diameter of 80 nm and a length of 6 mu m were produced by electrodeposition in nanoporous polycarbonate memb ranes. Their magnetoresistance has been measured in a geometry where t he current was perpendicular to the layer plane. The anisotropic part of the magnetoresistance was limited to 1.5%. The study, for layer thi cknesses ranging from 3 to 100 nm interpreted in terms of the Valet an d Fert model gave estimates of the spin dependent bulk and interface r esistivities acid their change with temperature. The large Co bulk res istivity value, caused by a large amount of Cu impurities, limited the magnetoresistance in our samples to 20% at room temperature and 30% a t 20 K. The Cu spin flip mean free path was found to be temperature in dependent and determined by scattering at Co impurities in the Cu laye r. It was measured for two sets of samples with different amounts of C o impurities. (C) 1996 American Institute of Physics.