OBSERVATION OF FERROMAGNETIC ORDERING IN HCP HE-3

High-density bcc and hcp He-3 have been cooled into the magnetically o rdered state by direct nuclear demagnetization. Pressure changes durin g precooling and demagnetization indicated the magnetic state of the s ystem. For a bcc sample with upsilon = 20.10 cm(3)/mole, the two well- known magnetic transitions were observed. For hcp samples precooled to 614 mu K in a field of 2.5 T, for which the spin entropy is almost ze ro, the transition to the ferromagnetic state was indicated by a decre ase in pressure near the end of the demagnetization. For hcp samples w ith S greater than or equal to 0.46R In 2 ferromagnetic ordering did n ot occur.