A liquid permanent magnet?

McClintock, Peter V. E. (1977) A liquid permanent magnet? Nature, 270 (5638). p. 559. ISSN 0028-0836

Abstract

According to A.J. Leggett (this issue of Nature, page 585) there is reason to believe that the A-phase of superfluid 3He may display ferromagnetic properties. An isolated sample of the liquid would thus be surrounded by its own spontaneously created magnetic field in much the same way as a conventional steel permanent magnet, although the physical origins of this magnetism would be rather difficult.