Short-Wavelength Spin Waves in Yttrium Iron Garnet Micro-Channels on Silicon
Short-Wavelength Spin Waves in Yttrium Iron Garnet Micro-Channels on Silicon
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硅上钇铁石榴石微通道中的短波长自旋波
DOI：
10.1109/lmag.2016.2616105
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发表时间：
2016-01-01
影响因子：
1.2
通讯作者：
Yu, Haiming
中科院分区：
文献类型：
--
作者：
Che, Ping;Zhang, Yan;Yu, Haiming
钇铁石榴石（YIG）由于其低的吉尔伯特阻尼常数而被广泛应用于自旋波研究。然而，大多数高质量的YIG薄膜生长在钆镓石榴石（GGG）衬底上，这使得它很难与现有的半导体技术集成。我们在硅衬底上纳米厚的YIG微通道中发现了自旋波的激发。YIG是通过脉冲激光沉积（PLD）在高纯氧中生长的，然后在沉积后在800°C下快速热退火。利用亚微米量级的弯曲共面波导，激发出波长低至1 μm的自旋波。通过测量自旋波反射谱的线宽，得到了吉尔伯特阻尼常数α = 1.9×10-3。
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°C after deposition. Using meander coplanar waveguides at submicrometer scale, spin waves with wavelength down to 1 μm are excited. By measuring the linewidth of the spin wave reflection spectra, a Gilbert damping constant α = 1.9×10-3 was obtained.