Effect of Y-La-Co substitution on microstructure and magnetic properties of M-type strontium hexagonal ferrites prepared by ceramic method
Abstract
M-type permanent magnetic ferrites Sr0.95-xY0.05LaxFe11.75Co0.25O19 (x = 0.00, 0.10, 0.20, 0.30, 0.40) have been prepared by ceramic process and investigated systematically. The phase compositions were examined by X-ray diffraction, the results showed that the single phase was obtained when x ≤ 0.30. The morphology of the magnets was investigated by scanning electron microscopy (SEM), the micro-morphology of the particles exhibited the uniform plane hexagonal structure with different lanthanum content. Magnetic properties of the sample were measured by a physical property measurement system-vibrating sample magnetometer (PPMS-VSM). The saturation magnetization (Ms) decreases constantly with the increasing of La content (x). However, the coercivity (Hc) increases as the increasing of doping content.
- Publication:
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Journal of Magnetism and Magnetic Materials
- Pub Date:
- January 2018
- DOI:
- 10.1016/j.jmmm.2017.08.079
- Bibcode:
- 2018JMMM..445....1L
- Keywords:
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- Hexagonal ferrites;
- Micro-morphology;
- Magnetic properties