Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1497934 | Progress in Solid State Chemistry | 2007 | 6 Pages |
Abstract
We have prepared polycrystalline samples of Sr3YCo4O10.56, Sr2.4Ca0.6YCo4O10.54, and Sr3YCo3.76Mn0.24O10.59, and found that these materials show unusual impurity effects on their transport and magnetic properties. A tiny amount of impurities such as Mn or Ca suppresses room-temperature ferromagnetism of Sr3YCo4O10.56. With the suppression, their resistivities and thermopowers are also dramatically changed. We propose that the unusual impurity effects are caused by the suppression of orbital ordering.
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Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
W. Kobayashi, S. Yoshida, I. Terasaki,