Magnetic measurements have been made on a sample of in a Pomeranchuk cell. Below about 2.7 mK, the NMR line apparently associated with the liquid portion of the sample shifts continuously to higher frequencies during cooling. Below about 2 mK the frequency shift vanishes, and the magnitude of the liquid absorption drops abruptly to approximately ½ its previous value. These measurements are related to the pressure phenomena reported by Osheroff, Richardson, and Lee.
- Received 7 July 1972
- Published in the issue dated 2 October 1972
© 1972 The American Physical Society