Magnetic structure and spin wave excitations in the multiferroic magnetic metal-organic framework (CD$_3$)$_2$ND$_2$[Mn(DCO$_2$)$_3$]

TL;DR

This study investigates the magnetic structure and spin wave excitations in a multiferroic metal-organic framework using neutron scattering, revealing a G-type antiferromagnetic order and a detailed model of magnetic interactions.

Contribution

It provides the first detailed magnetic structure and spin wave analysis of this specific metal-organic framework, introducing a model for its magnetic interactions based on neutron scattering data.

Findings

Magnetic structure is G-type antiferromagnetic with moments along the b axis.

Identified three-dimensional magnetic interaction network with specific exchange constants.

Developed a linear spin wave theory model matching experimental data.

Abstract

We report the magnetic diffraction pattern and spin wave excitations in (CD$_3$)$_2$ND$_2$[Mn(DCO$_2$)$_3$] measured using elastic and inelastic neutron scattering. The magnetic structure is shown to be a G-type antiferromagnet with moments pointing along the $b$ axis. By comparison with simulations based on linear spin wave theory, we have developed a model for the magnetic interactions in this multiferroic metal-organic framework material. The interactions form a three-dimensional network with antiferromagnetic nearest-neighbour interactions along three directions of $J_1=-0.103(8)$~meV, $J_2=-0.032(8)$~meV and $J_3=-0.035(8)$~meV.