Absence of ferromagnetism in Mn- and Co-doped ZnO
| dc.creator | Rao, C. N. R. | |
| dc.creator | Deepak, F. L. | |
| dc.date | 2004-07-05 | |
| dc.date | 2004-08-24 | |
| dc.date.accessioned | 2026-07-07T02:59:01Z | |
| dc.date.available | 2026-07-07T02:59:01Z | |
| dc.description | Following the theoretical predictions of ferromagnetism in Mn- and Co-doped ZnO, several workers reported ferromagnetism in thin films as well as in bulk samples of these materials. While some observe room-temperature ferromagnetism, others find magnetization at low temperatures. Some of the reports, however, cast considerable doubt on the magnetism of Mn- and Co-doped ZnO. In order to conclusively establish the properties of Mn- and Co-doped ZnO, samples with 6 percent and 2 percent dopant concentrations, have been prepared by the low-temperature decomposition of acetate solid solutions. The samples have been characterized by x-ray diffraction, EDAX and spectroscopic methods to ensure that the dopants are substitutional. All the Mn- and Co-doped ZnO samples (prepared at 400 deg C and 500 deg C) fail to show ferromagnetism. Instead, their magnetic properties are best described by a Curie-Weiss type behavior. It appears unlikely that these materials would be useful for spintronics, unless additional carriers are introduced by some means. | |
| dc.description | 23 pages, 9 figures. submitted to J. Mater. Chem 2004 | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0407108 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0407108 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/24348 | |
| dc.subject | Materials Science | |
| dc.title | Absence of ferromagnetism in Mn- and Co-doped ZnO | |
| dc.type | text |