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Model of bits with each bit consisting of three layers with different magnetic properties (corresponds to stack #3, Table I).
Descending branches of the hysteresis loops for various layer stacks given in Table I. The uniaxial magnetic anisotropy constant of the hard layer was set to .
(a) Switching field and (b) normalized SFD as a function of the magnetic anisotropy value of the hard layer for various layer stacks given in Table I for the case when the distributions of magnetic anisotropy values of the different layers are uncorrelated. (c) SFD/ of the trilayer stack (stack #3, Table I) with correlated and uncorrelated magnetic anisotropy values of the different layers in one bit. Please note that the error bars in (a) are within the size of the symbols. Moreover, the legend of subfigure (a) applies to subfigure (b) as well.
Magnetic and geometrical properties of the bit arrays with various layer stacks. The thickness of the individual layers in the stack, t, and the corresponding magnetic properties are listed. is the uniaxial magnetic anisotropy constant and the saturation magnetization of the layer.
Energy barriers, , for magnetization reversal of the central bit in the array for the case when the distributions of the magnetic anisotropy values of the layers are not correlated. and SFD/ are also given. The magnetic anisotropy value of the hard layer was set to .
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