Local Magnetic Field at a Positive Muon in Ferromagnetic Cobalt

Abstract

The local magnetic field at a stopped positive muon has been measured in single crystals of Co as a function of temperature between 4 and 1100 K and of external magnetic field between 0 and 2 kG. The measurements demonstrate the importance of a dipolar contribution to the local field and give a strong indication that the muon occupies the octahedral interstitial site.