Research Article
Structural Analysis and Magnetic Properties of FeCo Alloys Obtained by Mechanical Alloying
Table 1
Crystal structure, cell parameters, microstrain, and grain size from Rietveld refinement.
| Composition FeCo | Crystal structure/space group | % vol. | Cell parameter(s), (, , ) (Å) | rms, microstrain | Grain size (nm) |
| Fe90Co10 | bcc/Im-3m | 100 | 2.86 | 0.0035 | 294 |
| Fe80Co20 | bcc/Im-3m | 100 | 2.87 | 0.0036 | 265 |
| Fe70Co30 | bcc/Im-3m | 100 | 2.86 | 0.0039 | 286 |
| Fe60Co40 | bcc/Im-3m | 100 | 2.87 | 0.0040 | 261 |
| Fe50Co50 | bcc/Im-3m | 50.3 | 2.85 | 0.0076 | 168 | bcc/Im-3m | 49.7 | 2.86 | 0.0052 | 2520 |
| Fe40Co60 | bcc/Im-3m | 100 | 2.84 | 0.0041 | 234 |
| Fe30Co70 | Fe-bcc/Im-3m | 51.6 | 2.88 | 0.0001 | 165 | Co P63/mmc | 48.4 | 2.51, 2.51, 4.07 | 0.0176 | 967 |
| Fe20Co80 | Fe-bcc/Im-3m | 49.8 | 2.89 | 0.0062 | 103 | FeCo bcc/Pm-3m | 50.2 | 2.84 | 0.0029 | 96 |
| Fe10Co90 | Fe-bcc/Im-3m | 45.1 | 2.897 | 0.00005 | 102 | Fe P63/mmc | 46.1 | 2.35, 2.35, 3.81 | 0.01767 | 892 | Co Fm-3m | 7.6 | 3.54 | 0.00482 | 977 | Co P21 ma | 1.2 | 7.94, 7.9, 15.3 | 0.00029 | 1000 |
| Co, Fe | Fe-bcc/Im-3m | 6.7 | 2.86 | 0.00063 | 2000 | Co P63/mmc | 43.3 | 2.51, 2.51, 4.07 | 0.00012 | 240 | Fe Fm-3m | 7.2 | 3.54 | 0.00213 | 3209 | Fe-bcc/Im-3m | 42.7 | 2.86 | 0.00086 | 3117 |
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