Spin fluctuations in the quasi-two dimensional Heisenberg ferromagnet GdI_2 studied by Electron Spin Resonance

TL;DR

This study uses ESR spectroscopy to analyze spin fluctuations in GdI_2, revealing temperature-dependent behaviors linked to electron-spin interactions and supporting a specific spin susceptibility model.

Contribution

It provides experimental ESR data on GdI_2's spin dynamics and confirms the applicability of Eremin et al.'s spin susceptibility model.

Findings

Resonance field and ESR intensity follow the model by Eremin et al.

Resonance linewidth exhibits a maximum correlated with electrical resistance.

Scattering processes between conduction electrons and localized spins are discussed.

Abstract

The spin dynamics of GdI_2 have been investigated by ESR spectroscopy. The temperature dependences of the resonance field and ESR intensity are well described by the model for the spin susceptibility proposed by Eremin et al. [Phys. Rev. B 64, 064425 (2001)]. The temperature dependence of the resonance linewidth shows a maximum similar to the electrical resistance and is discussed in terms of scattering processes between conduction electrons and localized spins.