Abstract
Trilayer samples of CoFe/Mn/CoFe(001) have been prepared by molecular beam epitaxy and investigated by magnetometry and ferromagnetic resonance (FMR). Very strong near-90° coupling (up to 2.5 ergs/c) between the CoFe layers, with no evidence for 180° coupling, was found in all but the thickest Mn-layer samples. The field dependence of the magnetization requires that the coupling energy have the algebraic form suggested recently for antiferromagnetic interlayers. The observed angular dependence of both the acoustic and optical FMR modes found can be described by this model.
- Received 20 March 1995
DOI:https://doi.org/10.1103/PhysRevLett.75.1847
©1995 American Physical Society