Theory of Linear Spin Wave Emission from a Bloch Domain Wall
Abstract
We report an analytical theory of linear emission of exchange spin waves from a Bloch domain wall, excited by a uniform microwave magnetic field. The problem is reduced to a one-dimensional Schr\"odinger-like equation with a P\"oschl-Teller potential and a driving term of the same profile. The emission of plane spin waves is observed at excitation frequencies above a threshold value, as a result of a linear process. The height-to-width aspect ratio of the P\"oschl-Teller profile for a domain wall is found to correspond to a local maximum of the emission efficiency. Furthermore, for a tailored P\"oschl-Teller potential with a variable aspect ratio, particular values of the latter can lead to enhanced or even completely suppressed emission.
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Cite
@article{arxiv.1705.01852,
title = {Theory of Linear Spin Wave Emission from a Bloch Domain Wall},
author = {N. J. Whitehead and S. A. R. Horsley and T. G. Philbin and A. N. Kuchko and V. V. Kruglyak},
journal= {arXiv preprint arXiv:1705.01852},
year = {2017}
}
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