Phase diagram and spin waves in the frustrated ferro-antiferromagnet SrZnVO(PO4)2

TL;DR

This study investigates the magnetic properties and spin wave spectrum of SrZnVO(PO4)2, revealing significant frustration, quantum effects, and a unique magnetic phase, advancing understanding of frustrated ferro-antiferromagnetic materials.

Contribution

It provides the first detailed experimental characterization of SrZnVO(PO4)2, including its phase diagram and spin dynamics, highlighting novel magnetic phases and quantum renormalization effects.

Findings

Revealed substantial magnetic frustration in SrZnVO(PO4)2.

Identified a large quantum renormalization of exchange constants.

Discovered a novel pre-saturation magnetic phase for specific field orientations.

Abstract

Single crystals of the frustrated S=1/2 ferro-antiferromagnetic proximate square lattice material SrZnZnVO(PO$_4$)$_2$ are studied in magnetometric, calorimetric, neutron diffraction and inelastic neutron scattering experiments. The measured spin wave spectrum reveals a substantial degree of magnetic frustration and a large quantum renormalization of the exchange constants. The H-T magnetic phase diagram is established. It features a novel pre-saturation phase, which appears for only one particular field orientation. The results are discussed noting the similarities and differences with the previously studied and similarly structured Pb$_2$VO(PO$_4$)$_2$ compound.