| Autor: |
Dong Ho Kim, Jae-Hwan Cho, Y. G. Joh, S. H. Moon, Hyungdong Kim, S. I. Woo, Eng Chan Kim, Byungyong Kim |
| Rok vydání: |
2005 |
| Předmět: |
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| Zdroj: |
Journal of the Korean Magnetics Society. 15:106-108 |
| ISSN: |
1598-5385 |
| DOI: |
10.4283/jkms.2005.15.2.106 |
| Popis: |
The rutile polycrystal Ti_(0.99)(57)^Fe_(0.01)O₂ prepared with (57)^Fe enriched iron have been studied by Mossbauer spectroscopy, X-ray diffraction and VSM. The Mossbauer spectrum of Ti_(0.99)(57)^Fe_(0.01)O₂ consists of a ferromagnetic and a paramagnetic phase over all temperature ranging from 4 to 300 K. Isomer shifts indicate Fe²+ for the ferromagnetic phase, but Fe³+ for the paramagneic phase of Ti_(0.99)(57)^Fe_(0.01)O₂ sample. It is noted that the magnetic hyperfine field of ferromagnetic phase had the value about 1.48 times as large as that of α-Fe. The XRD data for Ti_(0.99)(57)^Fe_(0.01)O₂ showed a pure rutile phase with tetragonal structures without any segregation of Fe into particulates within the instrumental resolution limit. The magnetic hysteresis (M-H) curve at room temperature showed an obvious ferromagnetic behavior and the magnetic moment per Fe atom under the applied field of 1T was estimated to be about 0.71 μ_B, suggesting a low spin configuration of Fe ions. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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