Transverse spin dynamics of a one-dimensional XY system: A fit to spin-spin relaxation data

At low temperatures, the spin-spin relaxation mechanism in PrCl3 is caused by the fluctuating electric-field gradients due to the transverse Pr moments. In this paper, a finite-chain calculation for the transverse autocorrelation function Sxx(q,ω) has been performed and evaluated in the temperature range kT/J < 4. Qualitative agreement is found for the temperature dependence of the spin-spin relaxation time, and an explanation is proposed for the deviations observed. © 1983.