Bose-Einstein condensation of magnons in magnetic films

• Antragsteller: Professor Sergej O. Demokritov, Ph.D.
• Fachliche Zuordnung: Experimentelle Physik der kondensierten Materie
• Förderung: Förderung von 2006 bis 2012
• Projektkennung: Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 16851434

Subject of the project is magnons in a non-equilibrium state, created in a ferromagnet using external pumping. The main goal of the project is experimental observation of the Bose-Einstein-Condensation (BEC) of the magnon gas, i.e., the effect, which has been recently predicted theoretically. The distribution of magnons over the wavevector space and their possible condensation close to a given value of the wavevector will be studied by means of Brillouin light scattering. The utilization of the novel Brillouin light scattering technique with a sensitivity to the phase of magnon, very recently developed by us, allows the determination of the coherence characteristics of the magnon gas and the unambiguous corroboration of the BEC-transition.

• DFG-Verfahren: Sachbeihilfen
• Großgeräte: High-precision positioning system
• Gerätegruppe: 5900 Optische Bänke einschl. mechanischer Bauelemente