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January 27, 2013

Mtg: Light-Induced Magnetization Reversal of High-anisotropy TbCo Alloy Films

by @ 4:13 pm. Filed under ALL, NanoEngineering, Optics/Displays
 

THURSDAY January 31, 2013
SCV Magnetics Chapter
Speaker: Prof. Stephane Mangin, Center for Magnetic Recording Research, UC-SD
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
Web: ewh.ieee.org/r6/scv/mag

Magnetization reversal using circularly polarized light provides a way to control magnetization without any external magnetic field and has the potential to revolutionize magnetic data storage.? However, in order to reach ultra-high density data storage, high anisotropy media providing thermal stability are needed.? Here, we evidence all-optical magnetization switching for different TbxCo1-x ferrimagnetic alloy compositions using fs- and ps-laser pulses and demonstrate all-optical switching for films with anisotropy fields reaching 6 T corresponding to anisotropy constants of 3×106 ergs/cm3.? Optical magnetization switching is observed only for alloy compositions where the compensation temperature can be reached through sample heating.

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