| Автор | E C Passamani |
| Автор | C Larica |
| Автор | W R Santos |
| Автор | K M B Alves |
| Автор | A Biondo |
| Автор | E Nunes |
| Дата выпуска | 1999-02-01 |
| dc.description | In the present work, high-energy milling under two different atmospheres was applied to the intermetallic compound and to the chemical elemental powders of Er and Fe with stoichiometric composition. Sample A is the compound milled under Ar, sample B the compound milled under and sample C the elemental powders milled under atmosphere. X-ray diffraction (XRD) and Mössbauer spectroscopy (MS) results of the samples A and B show a segregation process with increase of the milling time. Under atmosphere, the initial compound was nearly dissociated with 50 h of milling, while with Ar atmosphere the segregation process was completed with 100 h of milling. From the analysis of the XRD and MS results, it was possible to observe the appearance of other phases at intermediate milling times, in both samples A and B. One phase was associated with an amorphous alloy with a magnetic ordering temperature, obtained by AC magnetic susceptibility, at about 190 K, a second phase was attributed to nanocrystallites of and a third one associated with an fcc Er high-pressure phase stabilized by N atoms. In the case of sample B, for milling times longer than 400 h, XRD and MS results indicate the presence of an Fe-Er-N disordered alloy, with magnetic ordering temperature above room temperature. The XRD and MS results of sample C show the formation of an amorphous phase, with about 87% of MS relative area in this phase at 68 h of milling. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Amorphization of obtained by milling under different atmospheres |
| Тип | paper |
| DOI | 10.1088/0953-8984/11/4/022 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 11 |
| Первая страница | 1147 |
| Последняя страница | 1156 |
| Аффилиация | E C Passamani; Departamento de Física, Universidade Federal do Espírito Santo, Vitória, ES, Brazil |
| Аффилиация | C Larica; Departamento de Física, Universidade Federal do Espírito Santo, Vitória, ES, Brazil |
| Аффилиация | W R Santos; Departamento de Física, Universidade Federal do Espírito Santo, Vitória, ES, Brazil |
| Аффилиация | K M B Alves; Departamento de Física, Universidade Federal do Espírito Santo, Vitória, ES, Brazil |
| Аффилиация | A Biondo; Departamento de Física, Universidade Federal do Espírito Santo, Vitória, ES, Brazil |
| Аффилиация | E Nunes; Departamento de Física, Universidade Federal do Espírito Santo, Vitória, ES, Brazil |
| Выпуск | 4 |
