Table 2.
Average particle size (DPS), average crystallites size (DCS), lattice parameter (a), saturation magnetization (Ms), remanent magnetization (MR), coercivity (Hc), and magnetic anisotropy constant (K) of CFO, MFO, ZFO, NFO, and CuFO NCs annealed at 300, 600, 900, and 1200 °C.
| NC | Temperature (°C) | CFO | MFO | ZFO | NFO | CuFO |
|---|---|---|---|---|---|---|
| DPS
(nm) |
1200 | 29 | 48 | 50 | 25 | 65 |
| DCS (nm) |
300 600 900 1200 |
7 11 18 28 |
6 15 33 45 |
4 11 21 49 |
3 8 10 23 |
9 20 38 60 |
| a (Å) |
300 600 900 1200 |
8.223 8.271 8.367 8.438 |
8.331 8.391 8.434 8.484 |
8.324 8.365 8.380 8.427 |
8.319 8.356 8.363 8.382 |
8.123 8.174 8.214 8.246 |
|
Ms (emu/g) |
300 600 900 1200 |
3.5 9.8 15.6 26.3 |
3.6 11.7 19.4 28.5 |
0.7 3.3 6.1 10.8 |
0.7 6.3 12.7 20.1 |
1.1 1.3 8.6 14.5 |
|
MR (emu/g) |
300 600 900 1200 |
0.25 0.97 5.10 11.96 |
0.26 1.39 6.66 14.83 |
0.07 0.31 1.23 1.67 |
0.03 1.19 1.36 6.82 |
0.23 0.03 0.92 3.03 |
|
Hc (T) |
300 600 900 1200 |
0.015 0.016 0.031 0.144 |
0.017 0.018 0.035 0.119 |
0.013 0.003 0.025 0.015 |
0.016 0.024 0.026 0.061 |
0.009 0.032 0.019 0.018 |
|
K·103 (erg/cm3) |
300 600 900 1200 |
0.033 0.098 0.304 2.378 |
0.038 0.132 0.426 3.392 |
0.005 0.006 0.096 0.102 |
0.007 0.094 0.207 0.770 |
0.006 0.028 0.103 0.163 |