Determination of the glass transition and nucleation temperatures in Ge2Sb2Te5 sputtered films

E. Morales-Sánchez; E. F. Prokhorov; A. Mendoza-Galván; J. González-Hernández

doi:10.1063/1.1427146

Determination of the glass transition and nucleation temperatures in Ge₂Sb₂Te₅ sputtered films

E. Morales-Sánchez, E. F. Prokhorov, A. Mendoza-Galván, J. González-Hernández

Research output: Contribution to journal › Article › peer-review

52 Scopus citations

Abstract

Amorphous Ge₂Sb₂Te₅ films were prepared by rf sputtering from the bulk alloy. Their electrical and optical properties were analyzed using impedance and optical transmission measurements as a function of temperature. From this analysis, it is found that the glass transition temperature of the as-prepared amorphous films is of about 100°C. This result is confirmed by calorimetric measurements. Impedance and optical measurements in films measured at temperatures between the glass transition and the crystallization temperatures show the appearance of the nucleation centers. Using models for two-phase materials, the electrical parameters of the crystalline and amorphous phases were estimated and related with structural parameters of the samples.

Original language	English
Pages (from-to)	697-702
Number of pages	6
Journal	Journal of Applied Physics
Volume	91
Issue number	2
DOIs	https://doi.org/10.1063/1.1427146
State	Published - 15 Jan 2002
Externally published	Yes

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title = "Determination of the glass transition and nucleation temperatures in Ge2Sb2Te5 sputtered films",

abstract = "Amorphous Ge2Sb2Te5 films were prepared by rf sputtering from the bulk alloy. Their electrical and optical properties were analyzed using impedance and optical transmission measurements as a function of temperature. From this analysis, it is found that the glass transition temperature of the as-prepared amorphous films is of about 100°C. This result is confirmed by calorimetric measurements. Impedance and optical measurements in films measured at temperatures between the glass transition and the crystallization temperatures show the appearance of the nucleation centers. Using models for two-phase materials, the electrical parameters of the crystalline and amorphous phases were estimated and related with structural parameters of the samples.",

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AU - Morales-Sánchez, E.

AU - Prokhorov, E. F.

AU - Mendoza-Galván, A.

AU - González-Hernández, J.

PY - 2002/1/15

Y1 - 2002/1/15

N2 - Amorphous Ge2Sb2Te5 films were prepared by rf sputtering from the bulk alloy. Their electrical and optical properties were analyzed using impedance and optical transmission measurements as a function of temperature. From this analysis, it is found that the glass transition temperature of the as-prepared amorphous films is of about 100°C. This result is confirmed by calorimetric measurements. Impedance and optical measurements in films measured at temperatures between the glass transition and the crystallization temperatures show the appearance of the nucleation centers. Using models for two-phase materials, the electrical parameters of the crystalline and amorphous phases were estimated and related with structural parameters of the samples.

AB - Amorphous Ge2Sb2Te5 films were prepared by rf sputtering from the bulk alloy. Their electrical and optical properties were analyzed using impedance and optical transmission measurements as a function of temperature. From this analysis, it is found that the glass transition temperature of the as-prepared amorphous films is of about 100°C. This result is confirmed by calorimetric measurements. Impedance and optical measurements in films measured at temperatures between the glass transition and the crystallization temperatures show the appearance of the nucleation centers. Using models for two-phase materials, the electrical parameters of the crystalline and amorphous phases were estimated and related with structural parameters of the samples.

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JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 2

ER -

Determination of the glass transition and nucleation temperatures in Ge₂Sb₂Te₅ sputtered films

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