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Polarity-dependent resistance switching in GeSbTe phase-change thin films: The importance of excess Sb in filament formation
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10.1063/1.3276272
/content/aip/journal/apl/95/25/10.1063/1.3276272
http://aip.metastore.ingenta.com/content/aip/journal/apl/95/25/10.1063/1.3276272
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Figures

Image of FIG. 1.
FIG. 1.

(a) Schematic (not to scale) of a capacitorlike memory cell with Ag/Al top-electrode, GST active layer and Mo bottom-electrode. (b) characteristic of such a cell with layer and Ag top-electrode showing PDR switching behavior. (c) Pulse-mode operation of the cell with voltage pulses of ±1.0 V amplitude and width.

Image of FIG. 2.
FIG. 2.

(a) Scanning electron microscope image (left) showing an array of Al top-electrode pads on GST layer. The magnified image (middle) shows a thin Au-wire ultrasonically bonded to one of the pads. Image on the right-side shows the schematic drawing of the cell. (b) characteristic of such a cell with layer and Al top-electrode showing the typical switching behavior. (c) Pulse-mode PDR switching of the cell with voltage pulses of ±1.5 V and .

Image of FIG. 3.
FIG. 3.

(a) characteristic of a capacitorlike cell, containing stoichiometric film and Ag top-electrode, showing the absence of PDR switching behavior. (b) Variation in cell resistance for 1.25 V and pulses, (c) variation in cell resistance for 1.5 V and pulses, and (d) variation in cell-resistance for 1.5 V and pulses. ▲: positive pulses; O: negative pulses. Important to note that the results shown in [(b)–(d)] are examples of consecutive tests performed on a single cell, such that finally the cell in (d) can show variations in resistance due to the extensive electrothermal stresses imposed to the cell.

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/content/aip/journal/apl/95/25/10.1063/1.3276272
2009-12-23
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Polarity-dependent resistance switching in GeSbTe phase-change thin films: The importance of excess Sb in filament formation
http://aip.metastore.ingenta.com/content/aip/journal/apl/95/25/10.1063/1.3276272
10.1063/1.3276272
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