Nonlinear cw NMR behavior, similar to that observed on ferromagnets at high rf powers, has been observed in superfluid 3He-B using a superconducting quantum interference device (SQUID) magnetometer in fields of 31, 102, 180, and 308 Oe and at a pressure of 21 bar. It is observed that beyond some threshold value of the transverse H1 field the z component of magnetization anomalously decreases and is followed by a rapid increase back to the normal resonance curve as the frequency of the H1 field is swept through resonance.
Published in Physical Review Letters, ed. Gene D. Sprouse, Volume 39, Issue 16, 1977, pages 1008-1011.
Webb, R. A. (1977). Ferromagneticlike resonance behavior in superfluid3He-B. Physical Review Letters, 39(16), 1008-1011. DOI: 10.1103/PhysRevLett.39.1008
© Physical Review Letters, 1977, American Physical Society