LARGE MAGNETORESISTANCE WITH LOW SATURATION FIELDS IN MAGNETIC MAGNETIC SUPERLATTICES

Citation
Jm. Gallego et al., LARGE MAGNETORESISTANCE WITH LOW SATURATION FIELDS IN MAGNETIC MAGNETIC SUPERLATTICES, Applied physics letters, 64(19), 1994, pp. 2590-2592
Citations number
17
Categorie Soggetti
Physics, Applied
Journal title
ISSN journal
00036951
Volume
64
Issue
19
Year of publication
1994
Pages
2590 - 2592
Database
ISI
SICI code
0003-6951(1994)64:19<2590:LMWLSF>2.0.ZU;2-Q
Abstract
Ni/Co multilayers grown by molecular beam epitaxy are found to exhibit a magnetoresistance DELTAR/R at liquid helium temperature as large as 8.2%, with saturation fields DELTAH almost-equal-to 22 Oe and a sensi tivity (DELTAR/R)/(2DELTAH) almost-equal-to 0.19% Oe-1. The highest ro om temperature sensitivity obtained to date in this system is 0.18% Oe -1 and at 4.2 K is 0.29% Oe-1. This demonstrates that high values of t he sensitivity can be achieved in multilayers in which both components are ferromagnetic. The magnetoresistance and saturation field can be tuned by the superlattice and growth parameters.