Structural parameters of SrFe12O19 (SFO), Sr0.95Gd0.05Fe11.7Cu0.3O19 (SGFCO-1), and Sr0.95Gd0.05Fe11.4Cu0.6O19 (SGFCO-2) showing crystallite size (D114) and lattice strain (ε), phase percentages (wt%), lattice parameters (a, b and c), and unit cell volume (V) along with parameters for Goodness of fit (χ2), residuals for unweighted pattern (Rp) and weighted pattern (Rwp).
| Sample | D 114 (nm) | ε | Crystal structure | Phase percentages (wt%) | Lattice parameters (Å) | V (Å3) | R Factor (%) | χ 2 |
|---|---|---|---|---|---|---|---|---|
| SFO | 42.5 | 0.0029 | SrFe12O19 | 72.8 ± 0.9 | a = b = 5.8761 (3) | 688.5 (1) | R p = 8.7 | 2.35 |
| P63/mmc (hexagonal) | c = 23.0239 (3) | R wp = 7.2 | ||||||
| α-Fe2O3 | 27.2 ± 0.5 | a = b = 5.0316 (2) | 301.1 (1) | R p = 6.8 | ||||
| R3̄c (Rhombohedral) | c = 13.7285 (2) | R wp = 5.9 | ||||||
| SGFCO-1 | 39.2 | 0.0031 | Sr0.95Gd0.05Fe11.7Cu0.3O19 | 78.6 ± 1.0 | a = b = 5.8801 (6) | 689.5 (1) | R p = 9.8 | 3.98 |
| P63/mmc (hexagonal) | c = 23.0269 (3) | R wp = 9.1 | ||||||
| α-Fe2O3 | 21.4 ± 0.3 | a = b = 5.0372 (6) | 301.9 (1) | R p = 8.9 | ||||
| R3̄c (rhombohedral) | c = 13.7397 (3) | R wp = 8.3 | ||||||
| SGFCO-2 | 43.0 | 0.0029 | Sr0.95Gd0.05Fe11.4Cu0.6O19 | 82.1 ± 1.5 | a = b = 5.8809 (7) | 689.9 (2) | R p = 10.3 | 5.54 |
| P63/mmc (hexagonal) | c = 23.0347 (4) | R wp = 9.6 | ||||||
| α-Fe2O3 | 17.9 ± 0.6 | a = b = 5.0431 (9) | 302.6 (2) | R p = 9.2 | ||||
| R3̄c (rhombohedral) | c = 13.7368 (8) | R wp = 7.1 |