Conduction-electron spin resonance of Na-Cs alloys in zeolite Y

The g shift of the conduction-electron spin resonance of Na-Cs alloy clusters is zeolite NaY has been measured and is found to follow the simple Elliot relation. In this model, the g shift depends upon the ratio of the spin-orbit coupling and energy-band separation. The assumption of a linear variation of both these parameters across the alloy series gives rise to a nonlinear variation of the g shift, as is found experimentally. The spin susceptibility changes from a Curie to a Curie-Weiss law with increasing Cs content, contrary to the predictions of the quantum size effect for noninteracting particles. © 1991 The American Physical Society.