Time-resolved investigation of nanosecond crystal growth in rapid-phase-change materials: Correlation with the recording speed of digital versatile disc media

Yoshimitsu Fukuyama; Nobuhiro Yasuda; Jungeun Kim; Haruno Murayama; Yoshihito Tanaka; Shigeru Kimura; Kenichi Kato; Shinji Kohara; Yutaka Moritomo; Toshiyuki Matsunaga; Rie Kojima; Noboru Yamada; Hitoshi Tanaka; Takashi Ohshima; Masaki Takata

doi:10.1143/APEX.1.045001

Time-resolved investigation of nanosecond crystal growth in rapid-phase-change materials: Correlation with the recording speed of digital versatile disc media

Yoshimitsu Fukuyama, Nobuhiro Yasuda, Jungeun Kim, Haruno Murayama, Yoshihito Tanaka, Shigeru Kimura, Kenichi Kato, Shinji Kohara, Yutaka Moritomo, Toshiyuki Matsunaga, Rie Kojima, Noboru Yamada, Hitoshi Tanaka, Takashi Ohshima, Masaki Takata

Research output: Contribution to journal › Article

14 Citations (Scopus)

Abstract

The crystallization process in digital versatile disc (DVD) media was investigated using a time-resolved X-ray diffraction apparatus coupled with in situ photoreflectivity measurement. The time profiles of crystallization were found to be consistent with the changes in photoreflectivity. The phase changes were characterized by the start and end time; 90 ±1 and 273 ± 1 ns for Ge₂Sb₂Te₅, and 85 ± 1 and 206 ± 1 ns for Ag_3.5In_3.5Sb_75.0Te _17.7, respectively. The faster crystallization time in Ag _3.5In_3.8Sb_75.0Te_17.7 is ascribed to its characteristic crystallization process; its X-ray diffraction profile shows a significant sharpening during the crystallization process, whereas the peak width of Ge₂Sb₂Te₅ remained unchanged. The present findings suggest that crystal growth control is another key for designing faster phasechange materials.

Original language	English
Pages (from-to)	450011-450013
Number of pages	3
Journal	Applied Physics Express
Volume	1
Issue number	4
DOIs	https://doi.org/10.1143/APEX.1.045001
Publication status	Published - Apr 1 2008
Externally published	Yes

All Science Journal Classification (ASJC) codes

Engineering(all)
Physics and Astronomy(all)

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Fukuyama, Y., Yasuda, N., Kim, J., Murayama, H., Tanaka, Y., Kimura, S., Kato, K., Kohara, S., Moritomo, Y., Matsunaga, T., Kojima, R., Yamada, N., Tanaka, H., Ohshima, T., & Takata, M. (2008). Time-resolved investigation of nanosecond crystal growth in rapid-phase-change materials: Correlation with the recording speed of digital versatile disc media. Applied Physics Express, 1(4), 450011-450013. https://doi.org/10.1143/APEX.1.045001

Time-resolved investigation of nanosecond crystal growth in rapid-phase-change materials : Correlation with the recording speed of digital versatile disc media. / Fukuyama, Yoshimitsu; Yasuda, Nobuhiro; Kim, Jungeun; Murayama, Haruno; Tanaka, Yoshihito; Kimura, Shigeru; Kato, Kenichi; Kohara, Shinji; Moritomo, Yutaka; Matsunaga, Toshiyuki; Kojima, Rie; Yamada, Noboru; Tanaka, Hitoshi; Ohshima, Takashi; Takata, Masaki.

In: Applied Physics Express, Vol. 1, No. 4, 01.04.2008, p. 450011-450013.

Research output: Contribution to journal › Article

Fukuyama, Y, Yasuda, N, Kim, J, Murayama, H, Tanaka, Y, Kimura, S, Kato, K, Kohara, S, Moritomo, Y, Matsunaga, T, Kojima, R, Yamada, N, Tanaka, H, Ohshima, T & Takata, M 2008, 'Time-resolved investigation of nanosecond crystal growth in rapid-phase-change materials: Correlation with the recording speed of digital versatile disc media', Applied Physics Express, vol. 1, no. 4, pp. 450011-450013. https://doi.org/10.1143/APEX.1.045001

Fukuyama, Yoshimitsu ; Yasuda, Nobuhiro ; Kim, Jungeun ; Murayama, Haruno ; Tanaka, Yoshihito ; Kimura, Shigeru ; Kato, Kenichi ; Kohara, Shinji ; Moritomo, Yutaka ; Matsunaga, Toshiyuki ; Kojima, Rie ; Yamada, Noboru ; Tanaka, Hitoshi ; Ohshima, Takashi ; Takata, Masaki. / Time-resolved investigation of nanosecond crystal growth in rapid-phase-change materials : Correlation with the recording speed of digital versatile disc media. In: Applied Physics Express. 2008 ; Vol. 1, No. 4. pp. 450011-450013.

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abstract = "The crystallization process in digital versatile disc (DVD) media was investigated using a time-resolved X-ray diffraction apparatus coupled with in situ photoreflectivity measurement. The time profiles of crystallization were found to be consistent with the changes in photoreflectivity. The phase changes were characterized by the start and end time; 90 ±1 and 273 ± 1 ns for Ge2Sb2Te5, and 85 ± 1 and 206 ± 1 ns for Ag3.5In3.5Sb75.0Te 17.7, respectively. The faster crystallization time in Ag 3.5In3.8Sb75.0Te17.7 is ascribed to its characteristic crystallization process; its X-ray diffraction profile shows a significant sharpening during the crystallization process, whereas the peak width of Ge2Sb2Te5 remained unchanged. The present findings suggest that crystal growth control is another key for designing faster phasechange materials.",

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AU - Kato, Kenichi

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