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|Title:||ALS-CXRO Seminar | S. Mangin|
|When:||01/30/2013 3:00 PM - 4:15 PM|
|Description:||Light–induced magnetization reversal of high-anisotropy TbCo alloy films|
Institut Jean Lamour, CNRS UMR 7198- Universite de Lorraine, Nancy France
currently: University of California, San Diego, Center for Magnetic Recording Research
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.
Stephane 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