Study and tailoring spin dynamic properties of CoFeB during rapid thermal annealing
Study and tailoring spin dynamic properties of CoFeB during rapid thermal annealing
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DOI：
10.1063/1.3549188
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发表时间：
2011-01
影响因子：
4
通讯作者：
Yaping Zhang;X. Fan;Weigang Wang;X. Kou;R. Cao;Xing Chen;C. Ni;L. Pan;J. Xiao
中科院分区：
文献类型：
--
作者：
Yaping Zhang;X. Fan;Weigang Wang;X. Kou;R. Cao;Xing Chen;C. Ni;L. Pan;J. Xiao
研究了20 nm CoFeB薄膜在380 °C退火过程中动态和静态磁性的实时演化。铁磁共振线宽在300 s退火内迅速减小30%，随着退火时间的延长而单调增加。静磁饱和度也有类似的变化趋势。线宽和各向异性之间的基本物理关系可以通过双磁振子散射理论联系起来。通过在CoFeB薄膜中掺杂Nb，在2000 s退火时间内，薄膜的阻尼保持在一个较低的值。该方法对CoFeB材料的动态特性进行了调控，为磁性和自旋电子学微波器件的发展提供了有益的参考。
We studied the real-time evolution of magnetic dynamic and static properties of 20 nm CoFeB thin film during annealing at 380 °C. The ferromagnetic resonance linewidth quickly reduces by 30% within 300 s annealing, and monotonically increases upon longer annealing. The magnetic static coercivity shows similar trend. The underlying physical relation between linewidth and anisotropy can be connected by the two-magnon scattering theory. By doping of Nb into CoFeB films, the damping was maintained at a low value within 2000 s annealing. This method to tailor the dynamic properties of CoFeB may benefit the development of magnetics and spintronics based microwave devices.