Open AccessMagnon Laser
Author(s) -
P. Nowik-Boltyk,
I. V. Borisenko,
V. E. Demidov,
S. O. Demokritov
Publication year - 2019
Publication title -
ukrainian journal of physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.213
H-Index - 17
eISSN - 2071-0194
pISSN - 2071-0186
DOI - 10.15407/ujpe64.10.938
Subject(s) - magnon , physics , bose–einstein condensate , laser , condensed matter physics , superfluidity , magnetic field , field (mathematics) , pulse (music) , quantum mechanics , ferromagnetism , mathematics , voltage , pure mathematics
We experimentally demonstrate a magnon laser based on the coherent Bose–Einstein condensate of magnons brought into motion by using a time-dependent spatially inhomogeneous magnetic field. We show that the application of a short field pulse results in the formation of a condensate cloud moving with the constant velocity of 930 m/s for the used parameters of the experiment. The number of magnons building the cloud is not changed during the propagation, which is reminiscent of the magnon superfluidity.