Colossal electroresistance and colossal magnetoresistance in spinel multiferroic CdCr2S4

Abstract

Colossal magnetoresistance (CMR) and electroresistance (CER) induced by the electric field in spinel multiferroic CdCr 2 S 4 are reported. It is found that a metal-insulator transition (MIT) in CdCr 2 S 4 is triggered by the electrical field. In magnetic fields, the resistivity  of CdCr 2 S 4 responds similarly to that of CMR manganites. Combing previous reports, these findings make CdCr 2 S 4 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.

Crystal structure and magnetic property correlation in Cd1−xMxCrBehera1, Bhobe2 2015Journal of Magnetism and Magnetic Materials13120View full textAdd to dashboardCite

“…Further, CdCr 2 S 4 also exhibits colossal electrocapacitive, electroresistive, and magnetoresistive effects [12]. With a general formula of AB 2 X 4 (where B¼ Cr and X ¼S, Se, Te) these spinel chalcogenides form a cube with space group Fd3m.…”

Magnetoelectricity in CoFe2O4 nanocrystal-P(VDF-HFP) thin films

“…Single-phase multiferroics, such as BiFeO 3 [1], YMnO 3 [2], and CdCr 2 S 4 [3], exhibit intrinsic magnetoelectric (ME) effect with inherent cross-coupling between magnetic and electric orders. However, such materials are empirically rare [4] and magnetoelectrically weak due to the contraindication between ferroelectricity and magnetism [5].…”

Theoretical Study of the Multiferroic Behavior of the Magnetic Relaxor Ferroelectric CdCr<sub>2</sub>S<sub>4</sub>

“…An evident anomaly in the dielectric constant at T C = 84 K has been reported [2] [3], indicating the magnetoelectric coupling between magnetism and dielectric properties. Magnetic and electric field dependent dielectric and magnetic properties are studied in multiferroic CCS by Sun et al [12]. Concerning the microscopic origin of the polar moments in CCS and CCSe it can be assumed that the ferroelectric distortions result from an off-center position of the Cr 3+ -ions, which generates a locally polar but macroscopically isotropic cluster state [13].…”