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  • 1
    Electronic Resource
    Electronic Resource
    On magnetic properties and domain structure of strontium ferrite particles : 37th Annual conference on magnetism and magnetic materials (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 6260-6262 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: SrFe12O19 is used commercially as carrier. Magnetic properties, crystal structure, particle morphology, grain structure, and magnetic domain structure were studied as a function of processing temperature (T). The particle properties were found to depend critically upon T. Excessively low T (e.g., 1000 °C) yields an incomplete reaction, with poor magnetics and impurity phases. Excessively high T (e.g., 1350 °C) alters the structure and is detrimental to the magnetic properties. Within the acceptable temperature range, low T produces fine grain and submicron magnetic domains, whereas high T produces coarse grain and a micron-size domain structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.352663
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Nonlinear interactions of particles in chains (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 68 (1990), S. 404-410 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Measurements of the effective electric dipole moments of conducting particle chains suspended in insulating dielectric liquid reveal the influence of dielectric breakdown between particles. This breakdown can lead to reversal of the sign of the interparticle force from attractive to repulsive. Other measurements with a vibrating sample magnetometer of the effective magnetic dipole moments of ferromagnetic particle chains provide clear evidence that chaining enhances nonlinear magnetization at a field intensity about a factor of 10 below the value at which saturation is observed for single particles. Both of these physical situations are examples of how nonlinear effects can influence the electromechanical interactions of closely spaced particles. The nonlinearity is caused by the very strong field intensification that occurs in the gaps between particles for chains parallel to an applied electric or magnetic field. A correspondingly strong nonlinear effect is predicted for the forces between particles in chains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.346836
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    Paper (German National Licenses)
    Fulltext
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