Ultrasonic study of the quasi-one-dimensional spin fluctuations in in the presence of a magnetic field
Phys. Rev. B 46, 169 – Published 1 July, 1992
DOI: https://doi.org/10.1103/PhysRevB.46.169
Abstract
High-resolution ultrasonic-velocity and -attenuation data are used to characterize the paramagnetic phase of as a function of temperature, frequency, and magnetic field (both amplitude and orientation). The interpretation of the results is based on a classical treatment of a compressible spin chain. Qualitative agreement is obtained but the experimental data put into question the validity of the classical approach for spin fluctuations in this system.