Correlation between electroresistance and magnetoresistance in La0.82Ca0.18MnO3 single crystal

Abstract

The resistivity of La0.82Ca0.18MnO3 single crystal has been investigated as a function of external magnetic field and separately under an applied current flow. The measurements were carried out at various temperatures below and above the ferromagnetic transition temperature TC. It has been found that the dynamic electroresistance exhibits stunning similarities to the colossal magnetoresistance at the corresponding temperatures. The correlation observed between the electric- and magnetic-field effects is attributed to electrically induced magnetoresistance.

Universal behavior of giant electroresistance in epitaxial La0.67Ca0.33MnO3 thin films

“…It has been shown that electric current and/or electric field has strong influence on manganites. [5][6][7][8][9][10][11][12][13][14] Most previous work are on the manganites with charge ordered state. Very recently, Gao et al.…”

Metal-insulator transition and electroresistance in lanthanum/calcium manganites La1-xCa x MnO3 (x= 0–0.5) from voltage-current-temperature surfaces

“…To our knowledge, ER or the lack of it has not been reported previously in a sample of this composition. = 0.2 At x = 0.18, just below the x-value of the sample to be next discussed, one report has been shown a closely-correlated ER and MR [43], with the ER being attributed to an electrically-induced MR, and another report an effectively decoupled ER and MR [8]. This x = 0.18 material, as it is cooled, first enters a FMM phase (below about 170 K), then a FMI phase (below about 120 K) [8,44].…”

Correlation between Extrinsic Electroresistance and Magnetoresistance in Fine-Grained La0.7Ca0.3MnO3

“…2,3) However, an unsolved issue is whether the origin of both the effects is same or different. In single crystals of doped manganites [2][3][4][5][6] argued that the boundary between the two segregated phases -ferromagnetic metallic (FMM) and charge-ordered insulating (COI) -moves under electric field establishing connectivity among the FMM islands. This, in turn, gives rise to charge carrier type (p or n) dependent ER yet no shift in transition temperature (T MI ).…”