IEEE S.F. Bay Area Council e-GRID's

Technology & Networking in Silicon Valley & the SF Bay Area: Upcoming Meetings, Courses and Conferences

July 23, 2012

Mtg: Microwave-Assisted Magnetic Recording

by @ 3:40 pm. Filed under ALL, Computers/Software, Electronics Design, NanoEngineering, Optics/Displays

TUESDAY September 18, 2012
SCV Magnetics Chapter
Speaker: Dr Mike Mallary, Western Digital Corp.
Time: Networking and pizza at 7:00 PM; Presentation at 7:30 PM
Cost: none
Place: Western Digital, 1710 Automation Parkway, San Jose
RSVP: not required

Perpendicular Magnetic Recording, PMR, will soon reach its superparamagnetic limit. Shingling the write process will allow significant increases in areal density but with significant system complexity and performance issues in some applications.? At this time, Heat Assisted Magnetic Recording and Bit Patterned Media are the primary candidates to replace PMR.? However there are significant concerns associated with these approaches.? The economics of BPM are a considerable barrier by most estimates.? The high temperatures of HAMR are a serious reliability concern and perfecting FePt media is very challenging.? Even though MAMR is not expected to extend areal density as far as these other alternatives, its implementation would require smaller changes from PMR.? Therefore MAMR may be able to sustain areal density growth while these alternate technologies are being perfected.? But can MAMR be made to work well enough?
At this time there are no published demonstrations of MAMR at high densities.? However, there are a number of reported observations of partial and full switching of PMR like media with moderate DC fields assisted by rf fields from micro-loops or a Spin Torque Oscillator (STO).? These results will be discussed along with the results of simulations and experiments by the author.? Micromagnetic simulations of the MAMR write process indicate that MAMR could approximately double recording density beyond the limits of PMR on optimized media.? The system studied was that of a STO in the write gap of a wide track shielded pole PMR like head as originally proposed and patented by Prof. Jimmy Zhu of the Data Storage System Center at Carnegie Mellon University.? Micromagnetic simulations of the MAMR write process, M-H loops with rf fields, Ferromagnetic Resonance of media, and STOs will be presented. In addition, some experimental results on media FMR and STO performance will be discussed.

Comments are closed.

[IEEE S.F. Bay Area Council -] [powered by WordPress .]

SF Bay Area Council


  • 5G (2)
  • ALL (4,702)
  • Antennas & Propagation (5)
  • BioEngineering (675)
  • Blogroll (33)
  • Circuits (16)
  • Communications (1,862)
  • Computers/Software (1,777)
  • Consumer Electronics (103)
  • Control Systems (23)
  • Electrical/Power (1,284)
  • Electronics Design (2,774)
  • Employment (4)
  • Employment opportunities (7)
  • Engineering Mgmt (1,819)
  • Green energy (48)
  • History (7)
  • Industrial Applications (91)
  • Information Theory (13)
  • Instrument and Measurement (1)
  • Magnetics (30)
  • Microwave (8)
  • NanoEngineering (876)
  • Optics/Displays (969)
  • Photonics (31)
  • PhotoVoltaics (4)
  • Product Safety (25)
  • Reliability (37)
  • Robotics and Automation (19)
  • Semiconductors (1,847)
  • Signal Processing (138)
  • Vehicular Technology (16)
  • Women in Engineering (8)
  • Young Professionals (5)

    Support our advertisers:

    Visit our

    Enabling Javascript allows us to show you upcoming conferences in this column.

    For the Firefox browser, select Tools/Options/Content and select "Enable Javascript".

    If you are using Microsoft Internet Explorer you may need to click on the yellow bar above and select 'Allow Blocked Content'. You must then click 'Yes' on the following security warning.


    September 2018
    S M T W T F S
    « May    

    View in Google Calendar

    search blog:

    SUBSCRIBE: Get the e-GRID twice a month by email - upcoming IEEE SF Bay Area meetings, conferences.

    RSS Feed Subscribe to our RSS Feed.

    PUBLICIZE your event to IEEE's membership.

    general links:

    22 queries. 2.040 seconds