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Applied Physics Letters / Volume 79 / Issue 20 / MAGNETISM AND SUPERCONDUCTIVITY

Appl. Phys. Lett. 79, 3293 (2001); http://dx.doi.org/10.1063/1.1418023 (3 pages)

Fragmentation of cobalt layers in Co/Cu multilayers monitored by magnetic and magnetoresistive measurements

F. Spizzo, E. Angeli, D. Bisero, P. Vavassori, and F. Ronconi

Istituto Nazionale di Fisica della Materia (INFM), Dipartimento di Fisica, Università degli Studi di Ferrara, Ferrara, Italy

(Received 16 April 2001; accepted 30 August 2001)

We have monitored the structural evolution of Co(tCo)/Cu(4×tCo) multilayers when tCo ranges from 12 to 2 Å. The investigation has been performed by studying their magnetization and giant magnetoresistance, since these properties are complementary in providing information about the structure of the magnetic species into the samples. In particular, in the intermediate range of thickness, we observed no correspondence between magnetic and magnetoresistive behavior. Finally, at sufficiently low thickness, the samples exhibit noninteracting superparamagnetic features. This kind of evolution has been ascribed to the progressive fragmentation of Co layers. © 2001 American Institute of Physics.

© 2001 American Institute of Physics

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KEYWORDS and PACS

Keywords

cobalt, magnetic multilayers, magnetisation, giant magnetoresistance, copper, metallic superlattices

PACS

  • 75.70.Cn

    Magnetic properties of interfaces (multilayers, superlattices, heterostructures)

  • 75.60.Ej

    Magnetization curves, hysteresis, Barkhausen and related effects

  • 75.47.De

    Giant magnetoresistance

  • 68.65.Ac

    Multilayers

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.1418023

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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