Rewriting magnetic phase change memory by laser heating

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

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

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
Volume49
Issue number16
DOIs
StatePublished - Mar 22 2016

Fingerprint

Phase change memory
Laser heating
laser heating
permeability
magnetic probes
Magnetic permeability
Amorphous films
Laser pulses
Crystalline materials
magnetic permeability
Processing
pulses
lasers

Keywords

  • magnetic
  • memory
  • phase change

ASJC Scopus subject areas

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

Cite this

Rewriting magnetic phase change memory by laser heating. / Timmerwilke, John; Liou, Sy-Hwang; Cheng, Shu Fan; Edelstein, Alan S.

In: Journal of Physics D: Applied Physics, Vol. 49, No. 16, 165005, 22.03.2016.

Research output: Contribution to journalArticle

Timmerwilke, John ; Liou, Sy-Hwang ; Cheng, Shu Fan ; Edelstein, Alan S. / Rewriting magnetic phase change memory by laser heating. In: Journal of Physics D: Applied Physics. 2016 ; Vol. 49, No. 16.
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