The magnetic to non-magnetic quantum phase transition induced by pressure (
P) in the weak itinerant metallic d-compound MnSi, is reviewed based on nuc
lear magnetic resonance (NMR) and bulk magnetic measurements. The pressure
effect on the bulk as well as the local magnetization are interpreted as a
first order phase transition at P-c. (C) 1999 Elsevier Science B.V. All rig
hts reserved.