Effect of lattice deformations on the local,magnetic dipole field of interstitial sites in H.C.P. crystals

It is shown that lattice deformations around interstitial atoms may give a significant contribution to the local magnetic dipolar field at the interstitial site. An analysis of the dipole field measured for mouns on octahedral interstitial sites in Co shows that 1/4 of the dipole field results from lattice deformations. The double force tensor of the muon is found to be nearly isotropic and of the order of magnitude of 4eV.