Figure 4
From: Excitation of coherent second sound waves in a dense magnon gas
Phase velocities VK(K′) of the “magnonic” (q ≠ 0) and “phononic” (q = 0, κ ≠ 0) dissipative second sound waves as functions of the wavenumber K′. In the calculations of the “magnonic” dispersion characteristics it was assumed that Γe = 2Γp. The experimental results for the magnonic second sound taken from Fig. 3b are shown by black dots.
