Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9803785 | Journal of Alloys and Compounds | 2005 | 7 Pages |
Abstract
A systematic study of physical properties of the defective manganites La0.8Sr0.2-xâ¡xMnO3 (0â¤xâ¤0.2) was carried out. The powdered samples have been prepared by the conventional ceramic method at 1673 K. The structural, magnetic and electrical properties of these compounds with the varied Mn3+/Mn4+ ratio are studied. These compounds crystallize in a rhombohedral (R3¯c) structure and exhibit a paramagnetic-semiconductor to ferromagnetic-metallic transition with decreasing temperature. The Curie temperature TC decreases from 294 K to 209 K with increasing vacancy content. The resistivity transition temperature TP decreases from 260 K to 190 K as Sr content decreases.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Ja. Dhahri, S. Zemni, K. Cherif, J. Dhahri, M. Oumezzine, M. Ghedira, H. Vincent,