Switching Characteristics of Composite Magnetic Thin Films

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Abstract
The effects of the strong exchange coupling between magnetic spins within a composite film, composed of multiple layers of ferromagnetics, are represented by biaxial and triaxial anisotropy terms to be added to the ordinary effective magnetic energy. The influences of these multiaxial terms on the form of the critical switching curves are studied theoretically and experimentally. An experimental result is given showing a considerable improvement of the pulse coincidence switching characteristic of an ordinary uniaxially anisotropic permalloy film by adding a very thin Ni-Co alloy layer thereupon.

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