Local structure in CoFe/Al2O3 multilayers determined by nuclear magnetic resonance

• Type: Article in International Scientific Journal
• Date: 2002

Authors

Lesnik, NA (Author) Other; Panissod, P (Author) Other; G.N. Kakazei (Author) Other; pogorelov, y. g. (Author) FCUP; sousa, j. b. (Author) FCUP; Snoeck, E (Author) Other; Cardoso, S (Author) Other; Freitas, PP (Author) Other; Wigen, PE (Author) Other

Journal

Title: Journal of Magnetism and Magnetic Materials

Vol. 242

Pages: 943-945

ISSN: 0304-8853

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 4 Citations

Scopus - 4 Citations

Other information

Authenticus ID: P-000-PWC

DOI: 10.1016/s0304-8853(01)01306-3

Abstract (EN): We studied NMR spectra at 1.5 K in a series of [Co80Fe20(t)/Al2O3(3 nm)](10) multilayers. The spectra are interpreted by mixed contributions from Co atoms inside CoFe granules and at their interface with Al2O3. They display three characteristic shapes when t varies from 0.8 to 2 nm. These shapes have been interpreted as resulting from granular CoFe layers for the thinnest ones (t < 1.3 nm), and continuous CoFe layers for the thickest ones (t > 1.6 nm), with an intermediate regime-pancake grains of different sizes-in between. These structural data correlate with three magnetic states deduced from the FMR and SQUID measurements in this system.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 3