Relative activation energy for laser-induced crystallization of phase change materials

Taejin Park, Mann-Ho Cho, Hyoungsub Kim

Research output: Contribution to journalArticle


The relative activation energy (E a ) derived from a pulsed laser-induced crystallization of phase change materials (PCMs) was suggested as a useful quantitative parameter to represent the practical switching speed, energy consumption, and storage reliability of phase change random access memory (PRAM). We employed the time-for-constant-fraction technique using the reflectivity change of PCMs and the irradiated laser power/pulse width. Using the suggested method, the E a values for the Ge 2 Sb 2 Te 5 (GST), Bi-doped GST (5.9 at%), and Sn-doped GST (17.7 at%) films were determined to be 6.34 × 10 -9 , 4.56 × 10 -9 , and 3.77 × 10 -9 J, respectively, which reflected their expected device performances of PRAM.

Original languageEnglish
Article number018004
JournalJapanese Journal of Applied Physics
Issue number1
Publication statusPublished - 2019 Jan 1


All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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