Relaxation time measurements in zinc alloys

Relaxation times obtained by means of de Haas-van Alphen measurements have been investigated in dilute alloys ofZnMn andZnAg. In both series of alloys measurements have been made on the needle, monster and lens sections of the Fermi surface. In theZnMn alloys, which exhibit a Kondo resistance minimum, the results analysed followingPaton andMuir 2] give a value for the s—d interaction constant,J, agreeing with this previous work. Similarly, an analysis followingNagasawa 4] givesJ values in agreement with that work. The situation posed by the existence of these two approaches, concerned as they are with opposite extreme limits, is discussed. In addition, the behaviour found in the other periods ofZnMn is discussed; here the effects seen on the needles are completely absent. A preprint of this paper was introduced during the discussion at the Conference on Electron Mean Free Paths by the Chairman of the Session, Dr.D. Shoenberg.