Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9803479 | Journal of Alloys and Compounds | 2005 | 5 Pages |
Abstract
We observe a strong electroresistive (ER) effect in slightly oxygen deficient Nd0.7Sr0.3MnO3âδ ceramic which behaves equivalent to the well-known magnetoresistive effect and which apparently involves both the higher insulating grain boundaries as well as parts of the domain (grain) volume, just like the MR in ceramics. While the magnetic field acts on the magnetic dipoles of the manganites (MR), the nature of the electrical dipole moments - intrinsic or extrinsic - is not fully understood as yet, but as the ER-effect increases dramatically with δ, for these compounds the evidence points to extrinsic electrical dipoles which appear together with a local restructuring when oxygen is formally missing.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
V. Morchshakov, C.P. Yang, I.O. Troyanchuk, K. Bärner,