Electron-Spin-Resonance Line Shape in Spherical Metal Particles

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Abstract
Dyson's theory of the electron-spin-resonance line shape for conduction electrons in metals has been extended for use with spherical particles in the region of normal skin effect. These more nearly correspond to typical samples, particularly so for naturally occurring metallic colloids. An explicit eigenfunction expansion is made for the fields and the magnetization, using eigenfunctions obtained from a Green's-function solution to the diffusion equation in this geometry. The line shapes vary roughly as in the one-dimensional case, and curves of this variation are shown to agree with experimental data for sodium.