Amorphization of TbFe3by nitrogen absorption
| Autor: | J. R. Cullen, R. Segnan, A. E. Clark, M. Q. Huang, S. F. Cheng |
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| Rok vydání: | 1993 |
| Předmět: | |
| Zdroj: | Journal of Applied Physics. 73:5733-5735 |
| ISSN: | 1089-7550 0021-8979 |
| DOI: | 10.1063/1.353607 |
| Popis: | The nitrogenation process of the TbFe3 intermetallic compound was studied by heat treating the alloy between 573 and 873 K in a nitrogen atmosphere. The structural and magnetic properties of the nitrogenated samples were characterized by x‐ray diffraction (XRD), Mossbauer spectroscopy, and magnetic measurements. The magnetic moments of the nitrogenated samples were found to be a function of the annealing temperature and showed a minimum for the sample heat treated at 673 K. The XRD pattern of this sample (673 K) showed that the Bragg peaks of the 1‐3 phase had completely disappeared and were replaced by a broad maximum indicating a breakdown of the TbFe3 structure into an amorphous phase. The room‐temperature Mossbauer spectrum of the same sample consisted almost entirely of a quadrupole‐split doublet plus a small amount of α‐Fe and TbFe3. This doublet split into a broad spectrum upon cooling which is typical of amorphous rare‐earth–transition‐metal compounds. For samples heat treated at higher temperatur... |
| Databáze: | OpenAIRE |
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