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FLUX SWITCHING IN MULTIPATH CORES
STANFORD RESEARCH INST MENLO PARK CALIF
A multipath ferrite core is divided into legs whose properties constitute the flux-swtching characteristics of the core. Flux switching due to rotation of magnetization and domain growth is divided into elastic and inelastic components. The switching characteristics of each individual leg are expressed in terms of the static flux F loop, elastic parameter e and inelastic parameters rho and F sub o. Based on these parameters, each leg is represented by an electrical-circuit analogue. The assembly of these analogues, according to the physical layout of the indivdual legs, represents the electrical-circuit anal gue of the multipath core. Continuous-output flux, which resuls from setting a multipath core followed by switching the set flux bck and forth around a minor aperture, is plotted versus the SET MMF, with the minor-aperture DRIVE MMF as a parameter. Various switching effects, caused by the geometry of a multipath core in conjunction with an external MMF, are discussed. Flux patterns in a multipath core are described simply by an arrow model. In analogy to domain wall theory, a more detailed model in terms of zone boundaries is proposed, and zone patterns for different flux states are suggested. Analyses of flux patterns based on solving Laplaces equation are evaluated. Author