Magnetodielectric and spin-lattice coupling in quasi 1D Ising spin chain CoNb$_{2}$O$_{6}$

TL;DR

This study investigates the magnetodielectric and spin-lattice coupling in CoNb₂O₆, revealing field-induced magnetic transitions and strong coupling between spins, lattice, and charges in a quasi 1D Ising spin chain.

Contribution

It provides experimental evidence of magnetodielectric and magnetostriction anomalies at magnetic transition fields in CoNb₂O₆, highlighting strong spin-lattice-charge coupling.

Findings

Sharp anomalies at critical magnetic fields in magnetodielectric and magnetostriction data.

Field-induced magnetic transitions are clearly reflected in dielectric and lattice responses.

Strong coupling between spins, lattice, and charges in CoNb₂O₆.

Abstract

We have studied magnetodielectric and spin-lattice coupling in CoNb$_{2}$O$_{6}$ single crystals. Magnetostriction and magnetodielectric experiments are performed at temperatures in and above antifferomagnetic phase of quasi 1D Ising spin chain CoNb$_{2}$O$_{6}$. Field induced magnetic transitions are clearly reflected in magnetodielectric measurement as well as magnetostriction measurement also. Two sharp anomalies are found around the critical fields of antiferromagnetic to ferrimagnetic transition and ferrimagnetic to saturated paramagnetic transition in both magnetodielectric and magnetostriction experiments. High field anomaly is more pronounced for magnetodielectric response and magnetostriction also. So, in CoNb$_{2}$O$_{6}$, spins are strongly coupled with lattice as well as charges also.