Journal
PHYSICAL REVIEW LETTERS
Volume 84, Issue 8, Pages 1812-1815Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.84.1812
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The thickness and temperature dependences of the interlayer exchange coupling in well-defined molecular beam epitaxy-grown Fe/Si/Fe sandwich structures have been studied. The biquadratic coupling shows a strong temperature dependence in contrast to the bilinear coupling. Both depend exponentially on thickness. These observations can be well understood in the framework of Slonczewski's loose spins model [J. Appl. Phys. 73, 5957 (1993)]. No bilinear contribution of the loose spins to the coupling was observed.
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