Thursday, January 31th, 2013
Not the usual third Tuesday of this month
Western Digital, 1710 Automation Parkway, San Jose, CA
Directions and Map
Cookies, Conversation &
Pizza too at 7:00 P.M.
Presentation at 7:30 P.M.
Light–induced magnetization reversal of high-anisotropy TbCo alloy films
Prof. Stéphane Mangin
Center for Magnetic Recording Research at UCSD
Abstract
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 3x106 ergs/cm3. Optical magnetization switching is observed only for
alloy compositions where the compensation temperature can be reached
through sample heating [1] .
[1] S. Alebrand et al., Appl. Phys. Lett. 101, 162408 (2012)
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