A CoFeB/Ru/CoFeB synthetic antiferromagnet grown on LiNbO3 shows FMR damping, linewidth, dispersion, and group velocity comparable to SAFs on standard substrates, supporting a new acousto-magnonic platform.
Unidirectional propagation of zero-momentum magnons
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abstract
We report on experimental observation of unidirectional propagation of zero-momentum magnons in synthetic antiferromagnet consisting of strained CoFeB/Ru/CoFeB trilayer. Inherent non-reciprocity of spin waves in synthetic antiferromagnets with uniaxial anisotropy results in smooth and monotonous dispersion relation around Gamma point, where the direction of the phase velocity is reversed, while the group velocity direction is conserved. The experimental observation of this phenomenon by intensity-, phase-, and time-resolved Brillouin light scattering microscopy is corroborated by analytical models and micromagnetic simulations.
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cond-mat.mtrl-sci 1years
2024 1verdicts
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Spectroscopy of the spin waves of a synthetic antiferromagnet grown on a piezoelectric substrate
A CoFeB/Ru/CoFeB synthetic antiferromagnet grown on LiNbO3 shows FMR damping, linewidth, dispersion, and group velocity comparable to SAFs on standard substrates, supporting a new acousto-magnonic platform.