title: Quasiballistic magnetization reversal.
abstract: We demonstrate a quasiballistic switching of the magnetization in a microscopic magnetoresistive memory cell. By means of time resolved magnetotransport, we follow the large angle precession of the free layer magnetization of a spin valve cell upon application of transverse magnetic field pulses. Stopping the field pulse after a 180 degrees precession rotation leads to magnetization reversal with reversal times as short as 165 ps. This switching mode represents the fundamental ultrafast limit of field induced magnetization reversal.
authors.affiliation: Institut d'Electronique Fondamentale, UMR 8622 CNRS, Université Paris Sud, Bâtiment 220, 91405 Orsay, France. schumach@ief.u-psud.fr
authors.forename: H W
authors.initials: HW
authors.lastname: Schumacher
authors.forename: C
authors.initials: C
authors.lastname: Chappert
authors.forename: R C
authors.initials: RC
authors.lastname: Sousa
authors.forename: P P
authors.initials: PP
authors.lastname: Freitas
authors.forename: J
authors.initials: J
authors.lastname: Miltat