Magnetization reversal in antiferromagnetically coupled ternary layers.

The magnetization reversal in selected antiferromagnetically coupled multilayers has been studied by solving the Landau-Lifshitz-Gilbert equation. The multilayers are composed of 10 nmt[sub l]/3 nmt[sub 2]/10 nmt[sub 3], where t[sub 1], t[sub 2], and t[sub 3] are soft magnetic material and are separated each other by thin nonmagnetic spacers. Our results suggest that the coupled ternary layers can possess good permanent magnet properties: A coercivity of 5-6 KOe and a hysteresis loop which can become approximately rectangular with an appropriate choice of parameters. The coercivity in such coupled layers originates from the interlayer coupling and the demagnetization field between layers. [ABSTRACT FROM AUTHOR]