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Vacancies and site occupation in Co-Ga-Fe alloys (Mossbauer study)
| Content Provider | Scilit |
|---|---|
| Author | Whittle, G. L. Clark, P. E. Cywinski, R. |
| Copyright Year | 1980 |
| Description | Journal: Journal of Physics F: Metal Physics X-ray and bulk density measurements on ordered B2 alloys in the series $Co_{2}Ga_{2-x}Fe_{x}$ (x=0.05-0.20) have yielded vacancy concentrations in the range 4 to 7%. Room temperature$ ^{57}$Fe Mossbauer spectra of the same alloys have been obtained. A computer simulation of a lattice model in which the Fe atoms randomly occupy sites on the Ga sublattice has been used to determine major near-neighbour environments of the Fe atoms. Individual components corresponding to 0, 1 and 2 vacancies in the near-neighbour shell have then been successfully fitted to the Mossbauer spectra. Room temperature Mossbauer spectra for a second series $Co_{2-y}Ga_{1.92+y}Fe_{0.08}$ (y=0.0-0.20) in which even more vacancies are forced on to the Co sublattice are also presented. Marked changes in the spectra at y=0.15 appear to be due to the occupation of vacant Co sites by Fe atoms. Mossbauer parameters for the alloys $CoGa_{3}$ and $FeGa_{3}$ have been measured and provide support for this interpretation. |
| Related Links | http://iopscience.iop.org/article/10.1088/0305-4608/10/10/008/pdf |
| Ending Page | 2104 |
| Page Count | 12 |
| Starting Page | 2093 |
| ISSN | 03054608 |
| DOI | 10.1088/0305-4608/10/10/008 |
| Journal | Journal of Physics F: Metal Physics |
| Issue Number | 10 |
| Volume Number | 10 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 1980-10-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: Journal of Physics F: Metal Physics Metallurgy and Metallurgical Engineering Lattice Model Bulk Density Computer Simulation Room Temperature |
| Content Type | Text |
| Resource Type | Article |
| Subject | Metals and Alloys 3100/3101 Engineering |
