Observation of hexagonal nuclei in the once melt-quenched Ge2 Sb2 Te5 phase change contact dimensions

Min Soo Youm; Yong Tae Kim; Man Young Sung

doi:10.1063/1.2773758

Observation of hexagonal nuclei in the once melt-quenched Ge2 Sb2 Te5 phase change contact dimensions

Min Soo Youm, Yong Tae Kim, Man Young Sung

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

3 Citations (Scopus)

Abstract

The microstructures of once melt-quenched Ge2 Sb2 Te5 (GST) phase change contact dimensions are directly investigated with high resolution transmission electron microscopy (HR-TEM) by applying reset pulse of 7-13 V. The ovonic threshold switching voltage is decreased from 4.1 to 2.8 V when the as-deposited GST cells are once melt quenched by 10 V. HR-TEM reveals that there are hexagonal nuclei in the once melt-quenched GST and the GST can be partially left in not the amorphous but the crystalline state when the molten GST is not swiftly quenched, which is an origin of the switching failure.

Original language	English
Article number	083508
Journal	Applied Physics Letters
Volume	91
Issue number	8
DOIs	https://doi.org/10.1063/1.2773758
Publication status	Published - 2007
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.2773758

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abstract = "The microstructures of once melt-quenched Ge2 Sb2 Te5 (GST) phase change contact dimensions are directly investigated with high resolution transmission electron microscopy (HR-TEM) by applying reset pulse of 7-13 V. The ovonic threshold switching voltage is decreased from 4.1 to 2.8 V when the as-deposited GST cells are once melt quenched by 10 V. HR-TEM reveals that there are hexagonal nuclei in the once melt-quenched GST and the GST can be partially left in not the amorphous but the crystalline state when the molten GST is not swiftly quenched, which is an origin of the switching failure.",

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AU - Sung, Man Young

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N2 - The microstructures of once melt-quenched Ge2 Sb2 Te5 (GST) phase change contact dimensions are directly investigated with high resolution transmission electron microscopy (HR-TEM) by applying reset pulse of 7-13 V. The ovonic threshold switching voltage is decreased from 4.1 to 2.8 V when the as-deposited GST cells are once melt quenched by 10 V. HR-TEM reveals that there are hexagonal nuclei in the once melt-quenched GST and the GST can be partially left in not the amorphous but the crystalline state when the molten GST is not swiftly quenched, which is an origin of the switching failure.

AB - The microstructures of once melt-quenched Ge2 Sb2 Te5 (GST) phase change contact dimensions are directly investigated with high resolution transmission electron microscopy (HR-TEM) by applying reset pulse of 7-13 V. The ovonic threshold switching voltage is decreased from 4.1 to 2.8 V when the as-deposited GST cells are once melt quenched by 10 V. HR-TEM reveals that there are hexagonal nuclei in the once melt-quenched GST and the GST can be partially left in not the amorphous but the crystalline state when the molten GST is not swiftly quenched, which is an origin of the switching failure.

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Observation of hexagonal nuclei in the once melt-quenched Ge2 Sb2 Te5 phase change contact dimensions

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