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Experimental study of the influence of particle size and switching field distribution on video tape output

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5 Author(s)
Auweter, H. ; BASF Aktiengesellschaft, Ludwigshafen, Germany ; Jachow, H. ; Jakusch, H. ; Schwab, E.
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With recorded wavelengths well under 1 micron the geometric dimensions of the particles start to have significant influence on the output of particulate media. The recorded wavelengths of well under 1 micron being used in video storage approach the length dimensions of standard recording pigments. As a single domain particle cannot support a magnetic transition along its length, the finite length of the particle leads to a reduction in the maximum output signal analogous to the gap loss function and known as length loss. At the same time also the magnetic homogeneity as expressed by (1-S*) becomes increasingly important. The authors experimentally verify the theoretical predictions regarding the influence of the particle parameters by measuring different sets of experimental tapes prepared with appropriate pigment samples

Published in:

Magnetics, IEEE Transactions on  (Volume:27 ,  Issue: 6 )

Date of Publication:

Nov 1991

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