Physics and Chemistry of Glasses

C. Rivera-Rodríguez, E. Prokhorov, G. Trapaga, E. Morales-Sánchez, M. Hernández-Landaverde, Yu Kovalenko, J. González-Hernández

Research output: Contribution to conferencePaper

1 Citation (Scopus)

Abstract

The aim of this work is to study the amorphous to crystalline transition in pure and oxygen doped (in the range of 0-15 at%) GeSb 2 Te 4 films in the process of isothermal heating. The transition was followed by x-ray diffraction and impedance measurements. The results show that in the material without oxygen, the initial nuclei have the GeSb 4 Te 7 composition, which could appear due to local fluctuations in the film composition. With increasing annealing time these nuclei transform into the crystalline GeSb 2 Te 4 phase. In films with an oxygen concentration in the range of 2-10%, the oxygen is located on tetrahedral interstitial sites and acts as the nucleation centre, producing nuclei with a single GeSb 2 Te 4 composition, which grow until crystallisation of the films is completed. In films with oxygen concentration above 10 at%, germanium is partially oxidised. Upon isothermal annealing, the amorphous films first crystallises into the fcc GeSb 2 Te 4 phase. Once this phase is completed, a new Sb 2 Te 3 crystalline phase starts to form until crystallisation is completed. These phenomena explain anomalous behaviours of the Avrami plot in films with high oxygen content.
Original languageAmerican English
Pages224-226
Number of pages3
StatePublished - 1 Apr 2005
Externally publishedYes
Eventconference -
Duration: 1 Apr 2005 → …

Conference

Conferenceconference
Period1/04/05 → …

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chemistry
physics
glass
oxygen
nuclei
crystallization
annealing
impedance measurement
germanium
interstitials
x ray diffraction
plots
nucleation
heating

Cite this

Rivera-Rodríguez, C., Prokhorov, E., Trapaga, G., Morales-Sánchez, E., Hernández-Landaverde, M., Kovalenko, Y., & González-Hernández, J. (2005). Physics and Chemistry of Glasses. 224-226. Paper presented at conference, .
Rivera-Rodríguez, C. ; Prokhorov, E. ; Trapaga, G. ; Morales-Sánchez, E. ; Hernández-Landaverde, M. ; Kovalenko, Yu ; González-Hernández, J. / Physics and Chemistry of Glasses. Paper presented at conference, .3 p.
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title = "Physics and Chemistry of Glasses",
abstract = "The aim of this work is to study the amorphous to crystalline transition in pure and oxygen doped (in the range of 0-15 at{\%}) GeSb 2 Te 4 films in the process of isothermal heating. The transition was followed by x-ray diffraction and impedance measurements. The results show that in the material without oxygen, the initial nuclei have the GeSb 4 Te 7 composition, which could appear due to local fluctuations in the film composition. With increasing annealing time these nuclei transform into the crystalline GeSb 2 Te 4 phase. In films with an oxygen concentration in the range of 2-10{\%}, the oxygen is located on tetrahedral interstitial sites and acts as the nucleation centre, producing nuclei with a single GeSb 2 Te 4 composition, which grow until crystallisation of the films is completed. In films with oxygen concentration above 10 at{\%}, germanium is partially oxidised. Upon isothermal annealing, the amorphous films first crystallises into the fcc GeSb 2 Te 4 phase. Once this phase is completed, a new Sb 2 Te 3 crystalline phase starts to form until crystallisation is completed. These phenomena explain anomalous behaviours of the Avrami plot in films with high oxygen content.",
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Rivera-Rodríguez, C, Prokhorov, E, Trapaga, G, Morales-Sánchez, E, Hernández-Landaverde, M, Kovalenko, Y & González-Hernández, J 2005, 'Physics and Chemistry of Glasses', Paper presented at conference, 1/04/05 pp. 224-226.

Physics and Chemistry of Glasses. / Rivera-Rodríguez, C.; Prokhorov, E.; Trapaga, G.; Morales-Sánchez, E.; Hernández-Landaverde, M.; Kovalenko, Yu; González-Hernández, J.

2005. 224-226 Paper presented at conference, .

Research output: Contribution to conferencePaper

TY - CONF

T1 - Physics and Chemistry of Glasses

AU - Rivera-Rodríguez, C.

AU - Prokhorov, E.

AU - Trapaga, G.

AU - Morales-Sánchez, E.

AU - Hernández-Landaverde, M.

AU - Kovalenko, Yu

AU - González-Hernández, J.

PY - 2005/4/1

Y1 - 2005/4/1

N2 - The aim of this work is to study the amorphous to crystalline transition in pure and oxygen doped (in the range of 0-15 at%) GeSb 2 Te 4 films in the process of isothermal heating. The transition was followed by x-ray diffraction and impedance measurements. The results show that in the material without oxygen, the initial nuclei have the GeSb 4 Te 7 composition, which could appear due to local fluctuations in the film composition. With increasing annealing time these nuclei transform into the crystalline GeSb 2 Te 4 phase. In films with an oxygen concentration in the range of 2-10%, the oxygen is located on tetrahedral interstitial sites and acts as the nucleation centre, producing nuclei with a single GeSb 2 Te 4 composition, which grow until crystallisation of the films is completed. In films with oxygen concentration above 10 at%, germanium is partially oxidised. Upon isothermal annealing, the amorphous films first crystallises into the fcc GeSb 2 Te 4 phase. Once this phase is completed, a new Sb 2 Te 3 crystalline phase starts to form until crystallisation is completed. These phenomena explain anomalous behaviours of the Avrami plot in films with high oxygen content.

AB - The aim of this work is to study the amorphous to crystalline transition in pure and oxygen doped (in the range of 0-15 at%) GeSb 2 Te 4 films in the process of isothermal heating. The transition was followed by x-ray diffraction and impedance measurements. The results show that in the material without oxygen, the initial nuclei have the GeSb 4 Te 7 composition, which could appear due to local fluctuations in the film composition. With increasing annealing time these nuclei transform into the crystalline GeSb 2 Te 4 phase. In films with an oxygen concentration in the range of 2-10%, the oxygen is located on tetrahedral interstitial sites and acts as the nucleation centre, producing nuclei with a single GeSb 2 Te 4 composition, which grow until crystallisation of the films is completed. In films with oxygen concentration above 10 at%, germanium is partially oxidised. Upon isothermal annealing, the amorphous films first crystallises into the fcc GeSb 2 Te 4 phase. Once this phase is completed, a new Sb 2 Te 3 crystalline phase starts to form until crystallisation is completed. These phenomena explain anomalous behaviours of the Avrami plot in films with high oxygen content.

M3 - Paper

SP - 224

EP - 226

ER -

Rivera-Rodríguez C, Prokhorov E, Trapaga G, Morales-Sánchez E, Hernández-Landaverde M, Kovalenko Y et al. Physics and Chemistry of Glasses. 2005. Paper presented at conference, .