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Light–induced magnetization reversal of high-anisotropy TbCo alloy films
January 31, 2013 @ 6:30 pm - 8:30 pm PST
Location: Western Digital, 1710 Automation Parkway, San Jose, CA
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Cookies, Conversation & Pizza too at 7:00 P.M.
Presentation at 7:30 P.M.
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 3×106 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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Biography
Stéphane Mangin is a visiting Professor at the Center for Magnetic Recording Research at UCSD. His visit is supported by an European Union program Marie Curie Action: “International Outgoing Fellowships for Career Development”. Stephane Mangin is professor at the Université de Lorraine and the group leader of the Nanomagnetism & spintronic team at the Institut Jean Lamour in Nancy. He is co-author of over 75 reviewed publications and has delivered more than 35 invited talk
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