کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9803479 | 1516468 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electroresistive effect in slightly oxygen deficient Nd0.7Sr0.3MnO3âδ ceramic
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 399, Issues 1â2, 16 August 2005, Pages 27-31
Journal: Journal of Alloys and Compounds - Volume 399, Issues 1â2, 16 August 2005, Pages 27-31
نویسندگان
V. Morchshakov, C.P. Yang, I.O. Troyanchuk, K. Bärner,