# Magnetic Structure and Dielectric State in the Multiferroic Ca$_{2}$CoSi$_{2}$O$_{7}$

## TL;DR

This study elucidates the magnetic and dielectric properties of Ca$_{2}$CoSi$_{2}$O$_{7}$, revealing a collinear antiferromagnetic structure and antiferroelectric behavior driven by spin-dependent hybridization, with insights into magnetic anisotropy.

## Contribution

The paper provides the first detailed neutron diffraction analysis of Ca$_{2}$CoSi$_{2}$O$_{7}$'s magnetic structure and discusses its dielectric state within the spin-dependent hybridization framework.

## Key findings

- Collinear antiferromagnetic structure with easy axis along <100>
- Antiferroelectric structure driven by spin-dependent hybridization
- Comparison of magnetic anisotropy with Ba$_{2}$CoGe$_{2}$O$_{7}$

## Abstract

Magnetic structure of the multiferroic Ca$_{2}$CoSi$_{2}$O$_{7}$ was determined by neutron diffraction techniques. Combination of the polycrystalline and single-crystal samples experiments revealed a collinear antiferromagnetic structure with the easy axis along $<$100$>$ directions. The dielectric state was discussed in the framework of the spin-dependent $d$-$p$ hybridization mechanism, leading to the realization of the antiferroelectric structure. The origin of the magnetic anisotropy was discussed in comparison with the isostructural Ba$_{2}$CoGe$_{2}$O$_{7}$.