The oxidation and magnetic properties of MP recording media particles

Citation
Ja. Hutchings et K. O'Grady, The oxidation and magnetic properties of MP recording media particles, IEEE MAGNET, 36(5), 2000, pp. 2435-2437
Citations number
9
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
IEEE TRANSACTIONS ON MAGNETICS
ISSN journal
0018-9464 → ACNP
Volume
36
Issue
5
Year of publication
2000
Part
1
Pages
2435 - 2437
Database
ISI
SICI code
0018-9464(200009)36:5<2435:TOAMPO>2.0.ZU;2-Y
Abstract
MP recording media pigments have been subjected to elevated temperatures of 180(C in air at various rates of heating from room temperature, It has bee n found that the rate of heating of these particles determines the final ox ide which the particles form. Analysis of the switching field distribution (SFD) of such particles before and after oxidation shows a broadening of th e SFD to lower switching fields. A comparative analysis with X-ray spectra performed on the oxidized particles indicates that particles with lower val ues of coercivity have been oxidized preferentially.