Spin-Wave Excitation in Nonferromagnetic Metals

Abstract

Using the Fermi-liquid theory, we have calculated the wave-number-dependent rf spin susceptibility of an interacting electron gas. For large $\omega \tau$ the kernel exhibits a branch of singularities, spin waves, which show up as sidebands on the electron spin-resonance line in thin slabs of metals. The character of these spin waves and their influence on electron spin resonance is discussed in detail.