Evidence for an electrical field induced order–order transition in Nd0.7Sr0.3MnO

Electroresistive effect in slightly oxygen deficient Nd0.7Sr0.3MnO3−δ ceramic

“…around T mi , just like the intrinsic magnetoresistance (MR), suggesting an intrinsic (domain volume) effect. T mi practically coincides with the rise (maximum slope) of the magnetisation curve M(T) [10] and obviously depends somewhat on the electrical current (field) with dT mi /dI < 0, again similar to the magnetic field shift of T mi , though different in sign, as dT mi /dH > 0 (see Fig. 4).…”

Unusual electroresistive effect in ceramic La0.49Ca0.51MnO3

“…Both is found experimentally, A 1 corresponds to [6], A 4 and A 6562 correspond to [7] and the ER-effect in oxygen deficient bulk NSMO is indeed very large as compared to that of comparable epitaxial layers [8,9]. For LCMO, the comparison of epitaxial layers [10,11] and ceramic samples [7,12] yields the same equivalency.…”

“…However, the ER-effects in CMR-materials are often found intertwined with the MR-effects [8,9] and this can be viewed as argument that a spin property will be involved here, too. Preliminary measurements under external magnetic fields yield a small MR, for example ≤11.5%/T at 32.5 K [22].…”