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Initial susceptibility of a textured fine particle system (1987)

Ayoub, N. Y. ; Laham, N. ; Popplewell, J. ; [et al.]

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 61 (1987), S. 3305-3307

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ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: The initial susceptibility of a ferrofluid containing Fe3O4 particles with a lognormal distribution of volume fraction, median diameter Dvm=72 A(ring), and σ=0.4 has been measured in the temperature range 80–300 K. The measurements were taken after the sample had been cooled from the liquid to the solid state in different magnetic fields (0–5000 Oe). The effect of these fields was to introduce a "texture'' in the solid state. The initial susceptibility of the textured system was found to reach a maximum at a characteristic temperature. The value depends on the freezing field and is lower the larger the freezing field. This behavior, associated with the degree of texture, is more noticeable in samples containing a large variation in particle size, σ=0.4.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.338939

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