Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9834257 | Journal of Magnetism and Magnetic Materials | 2005 | 4 Pages |
Abstract
Five specially prepared elongated metal particle pigments have been analysed to determine the detailed switching behaviour and magnetic viscosity. The particles varied in length from about 130Â nm down to 40Â nm. Hysteresis loops and time dependence measurements were made which led to a calculation of the activation volume of reversal. The activation volumes reduce with the particle size and are comparable for the smallest pigments. Physical particle sizes were measured by TEM. The objective of the work is to find the limiting size of the current technology determined by superparamagnetic behaviour.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
S.J.F. Chadwick, J.J. Blackwell, J.D. Dutson, K. O'Grady,