Rewriting magnetic phase change memory by laser heating

John Timmerwilke, Sy Hwang Liou, Shu Fan Cheng, Alan S. Edelstein

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Magnetic phase change memory (MAG PCM) consists of bits with different magnetic permeability values. The bits are read by measuring their effect on a magnetic probe field. Previously low permeability crystalline bits had been written in high permeability amorphous films of Metglas via laser heating. Here data is presented showing that by applying short laser pulses with the appropriate power to previously crystallized regions they can first be vitrified and then again crystallized. Thus, MAG PCM is rewriteable. Technical issues in processing the bits are discussed and results on thermal modeling are presented.

Original languageEnglish (US)
Article number165005
JournalJournal of Physics D: Applied Physics
Issue number16
StatePublished - Mar 22 2016


  • magnetic
  • memory
  • phase change

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films


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