Description: Description: IEEE Santa Clara Valley Section  

Description: Description: IEEE Magnetics Society

IEEE Magnetics Society
Santa Clara Valley Chapter
Meeting Presentation Summary



Tuesday, January 21st, 2014

Western Digital, 1710 Automation Parkway, San Jose, CA
Directions and Map

Cookies, Conversation & Pizza too at 6:45 P.M.
Presentation at
7:30 P.M.

FePt HAMR Recording Media
Progress and Key Requirements

Dr. Dieter Weller, Manager Future Recording Media
HGST a Western Digital Company


Highly chemically ordered and textured L10FePtX-Y (001) granular media with sufficient perpendicular magnetic anisotropy are key approaches for future high areal density heat-assisted magnetic recording (HAMR). X=Cu, Ag etc. reduces the Curie temperature and Y=Carbon, SiO2 etc. decouples the grains. Texture and heat sink layers optimize the recording speed and achievable areal density beyond 1Tb/in2.

This talk will summarize the ongoing HGST HAMR media efforts including experiments and modeling. Included are challenges and required research and development efforts based on joint discussions between HGST, Seagate and Western Digital at ongoing Advanced Storage Technology Consortium (ASTC) meetings.

For additonal information on this subject see:
    L10 FePtXY media for heat-assisted magnetic recording
    PSSa, Weller et al, May 29, 2013


A HAMR Media Technology Roadmap to an Areal Density of 4 Tb/in2
    IEEE Trans. Mag. , Weller et al, Jan 2014





Description: Description: Photo of AUTHORDieter Weller received a Ph.D. in physics in Germany in 1985 and worked for Siemens, IBM Almaden Research, Seagate R&D and is now at HGST a Western Digital company. His efforts include fabrication, characterization, electronic, magnetic and magneto-optical properties of thin films and multilayers relevant for magnetic recording. He is Fellow of the American Physical Society (APS), published 270 scientific papers and holds more than 60 U.S. patents. His current focus is on heat assisted magnetic recording.



  • Dr. Dieter Weller
  • Manager Future Recording Media
  • HGST a Western Digital Company
  • San Jose Research Center, San Jose, CA USA
  • eMail


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