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Surface Microstructure and Magnetic Properties of Laser-Processed Granular Co-Ag Films

Published online by Cambridge University Press:  10 February 2011

E. Agostinelli ,
D. Fiorani ,
S. Foglia ,
S. Kaciulis ,
A. M. Testa  and
M. Vittori-Antisari
E. Agostinelli
Affiliation:
ICMAT-CNR, Area della Ricerca, 00016 Monterotondo Scalo, ITALY, [email protected]
D. Fiorani
Affiliation:
ICMAT-CNR, Area della Ricerca, 00016 Monterotondo Scalo, ITALY, [email protected]
S. Foglia
Affiliation:
ICMAT-CNR, Area della Ricerca, 00016 Monterotondo Scalo, ITALY, [email protected]
S. Kaciulis
Affiliation:
ICMAT-CNR, Area della Ricerca, 00016 Monterotondo Scalo, ITALY, [email protected]
A. M. Testa
Affiliation:
ICMAT-CNR, Area della Ricerca, 00016 Monterotondo Scalo, ITALY, [email protected]
M. Vittori-Antisari
Affiliation:
ENEA,INN-NUMA, Roma, ITALY
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Abstract

Co-Ag films prepared by Pulsed Laser Deposition and showing GMR in the as deposited state, have been irradiated by excimer laser: the chemical and structural modification induced by such treatment have been studied by XPS and by atomic force and electron microscopies. The pulsed laser irradiation favors the nucleation of nanosized Co grains at Ag grain boundaries, resulting in an enhancement of the magnetoresistivity at low fields and low temperature. Indeed, after laser treatment, a doubled field sensitivity (δGMR/δH) at T=I0K, with respect to the untreated samples, has been observed. The correlation with the observed magnetic properties variations, is discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 562: Symposium L – Polycrystalline Metal & Magnetic Thin Films , 1999 , 75
Copyright
Copyright © Materials Research Society 1999

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References

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