THE MICROSTRUCTURE AND MAGNETIC PROPERTIES OF PERPENDICULARLY ORIENTED PARTICULATE MEDIA PREPARED IN REVOLVING ALTERNATING MAGNETIC FIELD
We have studied perpendicularly oriented particulate media prepared using a revolving alternating magnetic field. The microstructure on a coating medium of acicular magnetite particles and the magnetic properties were examined. Squareness ratio Rsz, intrinsic perpendicular magnetic anisotropy K∗⊥, a...
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| Veröffentlicht in: | Journal of the Magnetics Society of Japan 1989, Vol.13(S_1_PMRC_89), pp.S1_905-910 |
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| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | We have studied perpendicularly oriented particulate media prepared using a revolving alternating magnetic field. The microstructure on a coating medium of acicular magnetite particles and the magnetic properties were examined. Squareness ratio Rsz, intrinsic perpendicular magnetic anisotropy K∗⊥, and the easy axis depend on the orientation of the magnetic field in coated media. The maximum values of Rsz and K∗⊥ were 0.228 and 6.4×104 erg/cc, respectively. It was determined by observing the bright field image of the microstructure that acicular particles were arranged along the direction normal to the coatingplane in perpendicularly oriented tapes. |
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| ISSN: | 0285-0192 1880-4004 |
| DOI: | 10.3379/jmsjmag.13.S1_905 |