Ferromagnetism's affect on the Aharonov-Bohm effect - art. no. 172408

Aharonov-Bohm (AB) and Altshuler-Aronov-Spivak (AAS) oscillation in a ferro magnetic ring is studied theoretically. Ferromagnetism does not affect the AB effect in an essential way, except that the magnetic field becomes a sum of the external and internal field. AAS oscillation would be suppressed fo r a minority spin channel in most 3d metals because of a strong s-d scatter ing, as indicated by a large spin dependence of a lifetime. The majority sp in channel, in contrast, is expected to survive, due to a small density of states in the d band.