期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 322, 期 16, 页码 2381-2385出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2010.02.041
关键词
M-type strontium hexaferrite; La-Co substitution; Polymerizable complex method
资金
- Hyogo Science and Technology Association
Magnetic properties of La-Co substituted M-type strontium hexaferrites were studied. The samples were prepared by polymerizable complex method. Crystal structure of samples has been investigated by powder X-ray diffraction (XRD). Single-phase M-type strontium hexaferrites with chemical composition of Sr(1.05-x)La(x)Fe(12-x)Co(x)O(19) (x = 0-0.4) were formed by heating at 1173 K for 24 h in air. Magnetic properties were discussed by measurements of M-H curves with vibrating sample magnetometer (VSM). La-Co substituted M-type strontium hexaferrites prepared by polymerizable complex method showed typical magnetic hysteresis of hard ferrite. The coercive force increased significantly by La-Co substitution with polymerizable complex method. Maximum coercive force achieved in this study is 8.0 kOe (640 kA/m). Scanning electron microscopy revealed that the prepared ferrite particles have plate-like shape of diameter range between 20 and 500 nm. (C) 2010 Elsevier B.V. All rights reserved.
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