| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1797671 | Journal of Magnetism and Magnetic Materials | 2017 | 6 Pages |
•Al substituted M-type Ca–Sr hexaferrites were prepared by the conventional ceramic techniques.•The magnetic powders with Al content (x) from 1.0 to 1.4 consists of pure magnetoplumbite.•The saturation magnetization (Ms) linearly decreases with Al content (x) from 0 to 1.4.•The coercivity (Hc) increases with Al content (x) from 0 to 1.4.
In the current study, Al substituted M-type Ca–Sr hexaferrites, with composition Ca0.6Sr0.1La0.3Fe12−xAlxO19 (0≤x≤1.4), have been prepared using the conventional ceramic techniques. The phase composition of the magnetic powders was characterized by X-ray diffraction (XRD). The XRD data show that the magnetic powders with Al content (x) from 0 to 0.8 show α-Fe2O3 as a second phase, while the magnetic powders with x from 1.0 to 1.4 consist of pure magnetoplumbite without any other impurity phases. A field emission scanning electron microscopy (FE-SEM) was used to observe the morphologies of the magnetic powders. FE-SEM images of the magnetic powders show the hexagonal platelet-like shape. The magnetic properties of the magnetic powders were measured by a physical property measurement system-vibrating sample magnetometer (PPMS-VSM). The saturation magnetization (Ms) linearly decreases with Al content (x) from 0 to 1.4. While the remanent magnetization (Mr) first increases with Al content (x) from 0 to 0.2 and then decreases when Al content (x)≥0.2. However, the coercivity (Hc) increases with Al content (x) from 0 to 1.4.
