Observation of aggregates in magnetic particle lacquers
A method for preparing samples of magnetic lacquers for transmission electron microscopy is described. The samples contain only the permanent aggregates present in a suspension, and not the temporary agglomerates that are easily broken up when the suspension is sheared. The method is based on a dilu...
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| Veröffentlicht in: | IEEE transactions on magnetics 1990-01, Vol.26 (1), p.72-74 |
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| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | eng |
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| Zusammenfassung: | A method for preparing samples of magnetic lacquers for transmission electron microscopy is described. The samples contain only the permanent aggregates present in a suspension, and not the temporary agglomerates that are easily broken up when the suspension is sheared. The method is based on a dilution of the material studied with other magnetic particles that are dissolved after a thin film of the mixed suspension is deposited on a carbon substrate film. Using this method, it is shown that most of the chromium dioxide in a well-dispersed lacquer occurs in parallel aggregates of 2-10 particles that were never separated. The formation of new, lasting aggregates in the lacquer was found to take place in the course of days.< > |
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| ISSN: | 0018-9464 1941-0069 |
| DOI: | 10.1109/20.50494 |