Colossal Electroresistance and Colossal Magnetoresistance in Spinel Multiferroic CdCr2S4

TL;DR

This paper reports on the discovery of colossal electroresistance and magnetoresistance in the multiferroic spinel CdCr2S4, demonstrating electric field-induced metal-insulator transition and its similarities to CMR manganites, opening new avenues for material exploration.

Contribution

It reveals that CdCr2S4 exhibits all four properties of CMC, CEC, CER, and CMR, making it a unique compound with combined colossal electro- and magnetoresistive effects.

Findings

Electric field induces metal-insulator transition in CdCr2S4.

Resistivity responds similarly to magnetic fields as in CMR manganites.

CdCr2S4 uniquely exhibits all four colossal properties: CMC, CEC, CER, and CMR.

Abstract

Colossal magnetoresistance (CMR) and electroresistance (CER) induced by the electric field in spinel multiferroic CdCr2S4 are reported. It is found that a metal-insulator transition (MIT) in CdCr2S4 is triggered by the electrical field. In magnetic fields, the resistivity of CdCr2S4 responds similarly to that of CMR manganites. Combing previous reports, these findings make CdCr2S4 the unique compound to possess all four properties of the colossal magnetocapacitive (CMC), colossal electrocapacitive (CEC), CER, and CMR. The present results open a new venue for searching new materials to show CMR by tuning electric and magnetic fields.