Relaxation dynamics and colossal magnetocapacitive effect in CdCr2S4

TL;DR

This study investigates the relaxational dynamics in multiferroic CdCr2S4 and reveals that its colossal magnetocapacitive effect is driven by magnetic order-induced changes in relaxation behavior.

Contribution

It provides the first detailed broadband dielectric analysis linking magnetic order to relaxational dynamics in CdCr2S4, explaining its colossal magnetocapacitive effect.

Findings

Magnetocapacitive effect is caused by changes in relaxation dynamics.

External magnetic fields up to 10 T significantly alter dielectric relaxation.

Magnetic order development induces enormous changes in dielectric relaxation.

Abstract

A thorough investigation of the relaxational dynamics in the recently discovered multiferroic CdCr2S4 showing a colossal magnetocapacitive effect has been performed. Broadband dielectric measurements without and with external magnetic fields up to 10 T provide clear evidence that the observed magnetocapacitive effect stems from enormous changes of the relaxation dynamics induced by the development of magnetic order.