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Ion Irradiation on Phase Change Materials

Published online by Cambridge University Press:  03 August 2011

Emanuele Rimini ,
Egidio Carria ,
Antonio Massimiliano Mio ,
Maria Miritello ,
Santo Gibilisco ,
Corrado Bongiorno ,
Giuseppe D’Arrigo ,
Corrado Spinella ,
Francesco D’Acapito  and
Maria Grazia Grimaldi
Emanuele Rimini
Affiliation:
IMM-CNR, Catania, Italy.
Egidio Carria
Affiliation:
Dipartimento di Fisica e Astronomia, Università di Catania, Italy. MATIS-IMM-CNR, Catania, Italy.
Antonio Massimiliano Mio
Affiliation:
Dipartimento di Fisica e Astronomia, Università di Catania, Italy.
Maria Miritello
Affiliation:
MATIS-IMM-CNR, Catania, Italy.
Santo Gibilisco
Affiliation:
Dipartimento di Fisica e Astronomia, Università di Catania, Italy. MATIS-IMM-CNR, Catania, Italy.
Corrado Bongiorno
Affiliation:
IMM-CNR, Catania, Italy.
Giuseppe D’Arrigo
Affiliation:
IMM-CNR, Catania, Italy.
Corrado Spinella
Affiliation:
IMM-CNR, Catania, Italy.
Francesco D’Acapito
Affiliation:
ESRF GILDA CRG, CNR, IOM OGG, F-38043 Grenoble, France
Maria Grazia Grimaldi
Affiliation:
Dipartimento di Fisica e Astronomia, Università di Catania, Italy. MATIS-IMM-CNR, Catania, Italy.
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Abstract

Ion irradiation with 130 keV Ge+ or 120 keV Sb+ has modified, by thermal spike effect, the local atomic arrangement in the structure of as-deposited sputtered amorphous GeTe and Ge2Sb2Te5 thin films. The changes in the local order have been analyzed by Raman and EXAFS spectroscopy. In addition the crystallization kinetic, measured by “in situ” time resolved reflectivity and optical microscope analysis, is found to be faster in the irradiated samples. The nucleation rate and the grain growth velocity are enhanced by a factor of about ten with respect to the unirradiated samples in the investigated temperature range (120°C –170°C).

Keywords

Raman spectroscopyphase transformationextended x-ray absorption fine structure(EXAFS)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1354: Symposium II – Ion Beams—New Applications from Mesoscale to Nanoscale , 2011 , mrss11-1354-ii06-06
Copyright
Copyright © Materials Research Society 2011

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References

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