Back CH Allenspach R Weber W Parkin SS Weller D Garwin EL Siegmann HC 1999 Ultrafast magnetic field pulses as short as 2 picoseconds are able to reverse the magnetization in thin, in-plane, magnetized cobalt films. The field pulses are applied in the plane of the film, and their direction encompasses all angles with the magnetization. At a right angle to the magnetization, maximum torque is exerted on the spins. In this geometry, a precessional magnetization reversal can be triggered by fields as small as 184 kiloamperes per meter. Applications in future ultrafast magnetic recording schemes can be foreseen. https://sonar.ch/global/documents/127865 eng info:eu-repo/semantics/altIdentifier/doi/10.1126/science.285.5429.864 info:eu-repo/semantics/altIdentifier/pmid/10436149 Science (New York, N.Y.). - 1999 Multidisciplinary Minimum field strength in precessional magnetization reversal http://purl.org/coar/resource_type/c_6501