Crystallization behavior of as-deposited, melt-quenched, and primed amorphous states of Ge/sub 2/Sb/sub 2.3/Te/sub 5/ films in phase change optical recording

Phase-change erasable optical storage is based on the ability to switch a micron-sized region of a thin film between the crystalline and amorphous states using a diffraction-limited laser as a heat source. A bit of information can be represented as an amorphous spot on a crystalline background, and the two states can be optically identified by their different reflectivities. In a typical multilayer thin-film structure the active (storage) layer is sandwiched between one or more dielectric layers. The dielectric layers provide physical containment and act as a heat sink. A viable phase-change medium must be able to quench to the glassy phase after melting, and this requires proper tailoring of the thermal properties of the multilayer film. The present research studies one particular multilayer structure and shows the effect of an additional aluminum layer on the glass-forming ability.

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Electron Microscopy Study on Amorphous Ge-Sb-Te Thin Film for Phase Change Optical Recording

Japanese Journal of Applied Physics ◽

10.1143/jjap.42.l1158 ◽

2003 ◽

Vol 42 (Part 2, No. 10A) ◽

pp. L1158-L1160 ◽

Cited By ~ 9

Author(s):

Muneyuki Naito ◽

Manabu Ishimaru ◽

Yoshihiko Hirotsu ◽

Masaki Takashima

Keyword(s):

Thin Film ◽

Electron Microscopy ◽

Phase Change ◽

Microscopy Study ◽

Electron Microscopy Study ◽

Optical Recording

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New chalcogenide alloy as phase-change optical recording material

10.1117/12.447641 ◽

2001 ◽

Author(s):

Yagya D. Sharma ◽

Laxman Singh ◽

Promod K. Bhatnagar

Keyword(s):

Phase Change ◽

Optical Recording ◽

Recording Material

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Optical property study of phase change optical recording thin film media

10.1117/12.251986 ◽

1996 ◽

Author(s):

Yanwu Lu ◽

Ailun Rong

Keyword(s):

Thin Film ◽

Optical Property ◽

Phase Change ◽

Optical Recording

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Thermal Stability and Crystallization Behavior of PP/Organoclay Phase Change Composites

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.785-786.123 ◽

2013 ◽

Vol 785-786 ◽

pp. 123-126

Author(s):

Ying Ye ◽

Kun Yan Wang ◽

Ge Chang ◽

Qian Ying Jiang

Keyword(s):

Thermal Stability ◽

Phase Change ◽

Crystallization Behavior ◽

Melt Blending ◽

X Ray Diffraction ◽

Nucleation Agent ◽

Scanning Calorimetry ◽

Blending Method ◽

Phase Change Composites ◽

Change Material

Polypropylene/organoclay modified by dodecanol phase change material were prepared by melt blending method. The thermal stability and crystallization behavior was studied by thermogravimetry (TG), differential scanning calorimetry (DSC), and X-ray diffraction (XRD). TG results indicated the window of processing of PP could be improved by adding small amount organoclay modified by dodecanol to the blend. DSC showed the organoclay modified by dodecanol affected the crystallization behavior of PP as heterogeneous nucleation agent. XRD results show that the organoclay modified by dodecanol does not change the crystal structure in the blends but only decrease the intensity of the diffraction peak.

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