| Autor: |
A. Biondo, A.P. Guimarães, E. M. Baggio-Saitovitch, K.M.B. Alves, C. Larica |
| Rok vydání: |
1997 |
| Předmět: |
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| Zdroj: |
Journal of Magnetism and Magnetic Materials. 176:272-278 |
| ISSN: |
0304-8853 |
| DOI: |
10.1016/s0304-8853(97)00497-6 |
| Popis: |
With the aim of better understanding, the effects of severe milling on the magnetic and structural properties of crystalline compounds, samples of the intermetallic compound GdFe2 were milled up to 276h under inert atmosphere and characterized by X-ray diffractometry (XRD) and Mossbauer spectroscopy (MS). On milling GdFe2 a strong segregation of the elements Gd and Fe initially occurred, and the characteristic peaks of the initial compound GdFe2 in the XRD pattern are absent after 1 h of milling. MS and XRD results also show that the milled samples contain a mixture of three main components: the segregated elements, the initial compound and an amorphous alloy, with relative proportions that vary with milling time. At the longer milling times the process induces a solid-state reaction between these components leading to the formation of an amorphous solid solution of Gd and Fe. In these cases the Mossbauer spectra taken at 300, 84 and 4.2 K were fitted with a combination of a set of peaks typical of metallic α-Fe and a continuous distribution of hyperfine magnetic fields that are ascribed to the amorphous Gd-Fe phase. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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