Abstract
Measurements of the attenuation of zero sound in superfluid show coupling to a collective mode in applied magnetic fields at frequencies ν∼2Δ(T), which is identified as the J mode. The attenuation as a function of reduced temperature in zero magnetic field is subtracted from that measured in magnetic fields up to 80 mT to reveal both the =+1 and =-1 components. The measured G factor is in good agreement with theory. The =+1 resonance occurs in the pair excitation continuum and subtracts from the total attenuation, resulting in an antipeak.
- Received 9 April 1987
DOI:https://doi.org/10.1103/PhysRevLett.59.461
©1987 American Physical Society