Short-Wavelength Spin Waves in Yttrium Iron Garnet Micro-Channels on Silicon

Yttrium iron garnet (YIG) has been widely used in spin wave studies thanks to its low Gilbert damping constant. However, most high-quality YIG films are grown on gadolinium gallium garnet (GGG) substrate, which makes it difficult to integrate with existing semiconductor technology. We show spin wave excitation in a nanometer-thick YIG micro-channel on silicon substrate. The YIG is grown by pulsed laser deposition (PLD) in high-purity oxygen followed by rapid thermal annealing at 800 degrees C after deposition. Using meander coplanar waveguides at submicrometer scale, spin waves with wavelength down to 1 mu m are excited. By measuring the linewidth of the spin wave reflection spectra, a Gilbert damping constant alpha = 1.9 x 10(-3) was obtained.


Published in:
Ieee Magnetics Letters, 7, 3508404
Year:
2016
Publisher:
Piscataway, Ieee-Inst Electrical Electronics Engineers Inc
ISSN:
1949-307X
Keywords:
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 Record created 2017-02-17, last modified 2020-07-29

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