Bose-Einstein condensation of magnons in magnetic films

• Applicant: Professor Sergej O. Demokritov, Ph.D.
• Subject Area: Experimental Condensed Matter Physics
• Term: from 2006 to 2012
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 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 Programme: Research Grants
• Major Instrumentation: High-precision positioning system
• Instrumentation Group: 5900 Optische Bänke einschl. mechanischer Bauelemente