Magnetic Excitations in the Quasi-1D Ising-like Antiferromagnet TlCoCl$_3$

TL;DR

This study investigates magnetic excitations in the quasi-one-dimensional Ising-like antiferromagnet TlCoCl$_3$ using neutron scattering, revealing spin-wave continuum and estimating exchange and anisotropy parameters.

Contribution

First experimental observation of spin-wave excitation continuum in TlCoCl$_3$ and estimation of exchange and anisotropy constants based on Ishimura-Shiba theory.

Findings

Observed spin-wave excitation continuum consistent with domain-wall pair excitations.

Estimated exchange constant 2J as 14.7 meV.

Determined anisotropy parameter ε as 0.14.

Abstract

Neutron inelastic scattering measurements have been performed in order to investigate the magnetic excitations in the quasi-1D Ising-like antiferromagnet TlCoCl$_3$. We observed the magnetic excitation, which corresponds to the spin-wave excitation continuum corresponding to the domain-wall pair excitation in the 1D Ising-like antiferromagnet. According to the Ishimura-Shiba theory, we analyzed the observed spin-wave excitation, and the exchange constant $2J$ and the anistropy $\epsilon$ were estimated as 14.7 meV and 0.14 in TlCoCl$_3$, respectively.