Feasibility of recording 1 Tb/in2 areal density

Xiao Shen, Stephanie Hernandez, R. H. Victora

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


Exchange coupled composite media has a lower switching field compared to conventional perpendicular media at the same level of thermal stability, making it promising for high areal density recording. In this paper, we propose head and media specifications, calculated micromagnetically at a density of 1 Tb/in2, using a composite media with a synthetic antiferromagnet hard layer. We assume realistic constraints such as jitter to bit length ratio, skew, seed layer, and grain boundaries. T50 of the read back pulse is estimated using a current perpendicular to plane (CPP) giant magnetoresistive (GMR) reader and the magnetization noise is calculated. The signal to dc noise ratio is also estimated for the media used.

Original languageEnglish (US)
Pages (from-to)163-168
Number of pages6
JournalIEEE Transactions on Magnetics
Issue number1
StatePublished - Jan 2008

Bibliographical note

Funding Information:
This work was supported in part by the IGERT program of the National Science Foundation under Award DGE-0114372, the INSIC EHDR program, and Seagate Technology. The authors are grateful for resources from the University of Minnesota Supercomputing Institute.


  • Exchange coupled composite media
  • Terabit per square inch recording


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