Neutron Diffraction Studies on Temperature Driven Crystallographic Anisotropy in FeVO4 Multiferroic: Evidence of Strong Magnetostructural Correlations

TL;DR

This study uses neutron diffraction to analyze how temperature influences the anisotropic crystal structure of FeVO4, revealing strong magnetostructural coupling and significant lattice parameter changes at low temperatures.

Contribution

It provides detailed insights into the temperature-driven structural anisotropy and magnetostructural correlations in FeVO4, highlighting the strong coupling between magnetic and structural properties.

Findings

Large anisotropic changes in lattice parameters with temperature

Strong magnetostructural coupling below 22 K

Minimal changes in c lattice parameter and bcb angles

Abstract

We used temperature-dependent neutron diffraction measurements on FeVO4 to understand the temperature driven anisotropy and observed that the maximum change for a and b lattice parameters in conjunction with a large contraction in angle \beta\ as a function of temperature. The least changes are observed for the c lattice parameter and in \gamma\ angle. From these structural parameters, it can be said that, FeVO4 exhibits large structural anisotropy with lowering temperature. The large change in lattice parameters in magnetic phases i.e. below 22 K explains the strong magnetostructural coupling in FeVO4.