Spin correlations in the frustrated ferro-antiferromagnet SrZnVO(PO4)2 near saturation

TL;DR

This study investigates the spin correlations and magnetic phases of SrZnVO(PO4)2 using neutron scattering, revealing significant deviations from classical theory and identifying a presaturation transition linked to Dzyaloshinskii-Moriya interactions.

Contribution

It provides detailed experimental insights into the magnetic phases and spin dynamics of SrZnVO(PO4)2 near saturation, highlighting the role of Dzyaloshinskii-Moriya interactions.

Findings

Renormalized spin wave bandwidths observed

Redistribution of intensities between branches

Non-linear magnetization behavior

Abstract

Single crystal elastic and inelastic neutron scattering experiments are performed on the frustrated ferro-antiferromagnet SrZnVO(PO4)2 in high magnetic fields. The fully polarized state, the presaturation phase and the columnar-antiferromagnetic phase just bellow the presaturation phase were investigated. The observed renormalization of spin wave bandwidths, re-distribution of intensities between different branches and non-linearities in the magnetization curve are all indicative of strong deviations from classical spin wave theory. The previously observed presaturation transition is attributed to a staggered pattern of Dzyaloshinskii-Moriya interactions.