Figure 5

Magnetic hysteresis loops and tendency of M s and H c of the samples. (a) Magnetic hysteresis loops of the samples with different Co/Sr2+ molar ratios. (b) The tendency of M s and H c of the samples with different Co/Sr2+ molar ratios.
Magnetic hysteresis loops and tendency of M s and H c of the samples. (a) Magnetic hysteresis loops of the samples with different Co/Sr2+ molar ratios. (b) The tendency of M s and H c of the samples with different Co/Sr2+ molar ratios.