Temperature dependence of thermal properties of Ag8In14Sb55Te23 phase-change memory materials

Abstract

The dependence of thermal properties of Ag 8 In 14 Sb 55 Te 23 phase-change memory materials in crystalline and amorphous states on temperature was measured and analyzed. The results show that in the crystalline state, the thermal properties monotonically decrease with the temperature and present obvious crystalline semiconductor characteristics. The heat capacity, thermal diffusivity, and thermal conductivity decrease from 0.35 J/g K, 1.85 mm 2 /s, and 4.0 W/m K at 300 K to 0.025 J/g K, 1.475 mm 2 /s, and 0.25 W/m K at 600 K, respectively. In the amorphous state, while the dependence of thermal properties on temperature does not present significant changes, the materials retain the glass-like thermal characteristics. Within the temperature range from 320 K to 440 K, the heat capacity fluctuates between 0.27 J/g K and 0.075 J/g K, the thermal diffusivity basically maintains at 0.525 mm 2 /s, and the thermal conductivity decreases from 1.02 W/m K at 320 K to 0.

Two Synthetic Approaches to Ag3.4In3.7Sb76.4Te16.5 Bulk ­Samples and their Transport Properties

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Sensitivity of micromechanical actuation on amorphous to crystalline phase transformations under the influence of Casimir forces

“…Using the data of [27,28], separation z=50 nm, which is comparable to the minimum separation in the force measurements with R=10.1 µm…”

“…dT with C ୮ the specific heat capacity, T RT =300 K, and T cr =451 K the crystallization temperature for AIST [27,28]. The energy necessary for amorphization (via…”

Marangoni effect induced micro/nano-patterning on Sb2Te3 phase change thin film by laser pulse

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“…Sb 2 Te 3 phase change materials have been extensively used as optical and nonvolatile electrical data storage media due to the large difference of optical reflectivity and electrical resistivity between crystalline and amorphous states [13][14][15][16][17][18][19][20][21][22]. Sb 2 Te 3 phase change materials are very sensitive to temperature [14,17], thus the Marangoni effect can be observed more than other materials when induced by pulse lasers and different patterns can be formed accordingly.…”