Contact: Prof. Bernhard Keimer
b.keimer@fkf.mpg.de
0049-711-689-1631
Max-Planck-Gesellschaft

Spin Wave in MnF2

Caption: A "snapshot" of a spin wave in the antiferromagnet MnF2. The basic unit of the MnF2 crystal is depicted: the gray spheres represent Mn2+ ions and the green spheres F- ions. A spin (thick black arrows) is associated with each Mn2+ ion. Those at the corners of the cell point approximately in the opposite direction from that at the center. In a spin-wave excitation, the spins may be considered to precess around cones (shown here in blue). In the experiment reported here, the lifetime of long-lived spin waves was measured over a broad range of momenta.

Credit: Max Planck Institute for Solid State Physics

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