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Magnetic properties of La-Co substituted M-type strontium hexaferrites prepared by polymerizable complex method |
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| Authors: | Takeyuki Kikuchi Tatsuya Nakamura Makoto Nakanishi Jun Takada |
| Affiliation: | a Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo, 2167 Syosya Himeji-shi 671-2280, Japan b Department of Electrical Engineering and Computer Sciences, Graduate School of Engineering, University of Hyogo, 2167 Syosya Himeji-shi 671-2280, Japan c Department of Applied Chemistry, Faculty of Engineering, Okayama University, 3-1-1 Tsushima-naka Okayama 700-8530, Japan d Research Institute for Production Development, 15 morimoto-cho shimogamo sakyo-ku Kyoto-shi Kyoto 606-0805, Japan |
| Abstract: | 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 Sr1.05−xLaxFe12−xCoxO19 (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. |
| Keywords: | M-type strontium hexaferrite La-Co substitution Polymerizable complex method |
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