11 Dec
2013
11 Dec
'13
7:52 a.m.
In 1991 a Finnish group (Hakonen et al.) discovered spontaneous ordering among the nuclear spins in silver at 560 picokelvins. That may still be the record, for observed phase transitions in ordinary bulk matter. -Veit On Dec 11, 2013, at 9:17 AM, "Cordwell, William R" <wrcordw@sandia.gov> wrote:
Don't know if you want to count this:
"During the 1970s, David Lee, Douglas Osheroff and Robert Coleman Richardson discovered two phase transitions along the melting curve, which were soon realized to be the two superfluid phases of helium-3.[21][22] The transition to a superfluid occurs at 2.491 millikelvins (i.e., 0.002491 K) on the melting curve. They were awarded the 1996 Nobel Prize in Physics for their discovery."