We have developed longitudinal pumping and angular dependent ferromagnetic resonance techniques to investigate the temperature dependence of the interlayer exchange field Hₑₓ on a series of Co/Ru/Co trilayer films. Our results indicate, for the first time, that the variation of Hₑₓ with temperature follows roughly the relationship Hₑₓ∝(TT₀)sinh(TT₀) as predicted by theoretical models. In addition, no evidence of the biquadratic exchange term was observed in these samples.
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Zhang et al. (1994) studied this question.
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