Giant magnetoresistance and magnetism of heterogeneous CoCu produced by ion-beam techniques

Authors
Rossler, UK Noetzel, J Tselev, A Nenkov, K Handstein, A Eckert, D Muller, KH
Citation
Uk. Rossler et al., Giant magnetoresistance and magnetism of heterogeneous CoCu produced by ion-beam techniques, SENS ACTU-A, 91(1-2), 2001, pp. 169-172
Citations number
12
Categorie Soggetti
Instrumentation & Measurement
Journal title
SENSORS AND ACTUATORS A-PHYSICAL
ISSN journal
09244247 → ACNP
Volume
91
Issue
1-2
Year of publication
2001
Pages
169 - 172
Database
ISI
SICI code
0924-4247(20010605)91:1-2<169:GMAMOH>2.0.ZU;2-Y
Abstract
Magnetic properties and giant magnetoresistance (GMR) of granular CoCu laye rs produced by ion-beam mixing were investigated. Laser-deposited CoCu mult ilayers with an integral composition of Co20Cu80 were ion-beam mixed with 1 50 keV Cu+. At a maximum fluence of 5 x 10(15) Cu/cm(2) the multilayer stru cture is completely replaced by a granular microstructure. Thermal magnetiz ation curves indicate a broad distribution of Co-cluster sizes with superpa ramagnetic contributions. The magnetoresistance increases strongly by ion-b eam mixing. There is evidence for strong magnetic interaction effects relat ed with irradiation damages. The interaction effects can be reduced by anne aling, which further increases the magnetoresistance. (C) 2001 Elsevier Sci ence B.V. All rights reserved.