Light-induced magnetization reversal of high-anisotropy TbCo alloy films
  Magnetization reversal using circularly polarized light provides a new 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 composition 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 alloys which compensation temperature can be reached through sample heating. 
Sabine Alebrand, Matthias Gottwald, Michel Hehn, Daniel Steil, Mirko   Cinchetti, Daniel Lacour, Eric E. Fullerton, Martin A...
cond-mat.mtrl-sci