Spin-wave propagation and transformation in a thermal gradient
Spin-wave propagation and transformation in a thermal gradient
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DOI：
10.1063/1.4767137
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发表时间：
2012-11-05
影响因子：
4
通讯作者：
Hillebrands, Burkard
中科院分区：
文献类型：
--
作者：
Obry, Bjoern;Vasyuchka, Vitaliy I.;Hillebrands, Burkard
研究了温度梯度对外部激发的偶极自旋波在磁绝缘体波导中传播特性的影响。结果表明，自旋波沿沿着磁化方向向较冷区域传播时，其波长不断减小。该方法利用波在较热区域传播时波长的增加，实现波在不同位置反射的部分波导模的分解。温度对自旋波性质的影响主要是由饱和磁化强度的变化引起的，并且在自旋热电子应用中产生了操纵自旋波的有希望的机会。(C)2012年美国物理学会。[http：//dx.doi.org/10.1063/1.4767137]
The influence of a thermal gradient on the propagation properties of externally excited dipolar spin waves in a magnetic insulator waveguide is investigated. It is shown that spin waves propagating towards a colder region along the magnetization direction continuously reduce their wavelength. The wavelength increase of a wave propagating into a hotter region was utilized to realize its decomposition in the partial waveguide modes which are reflected at different locations. This influence of temperature on spin-wave properties is mainly caused by a change in the saturation magnetization and yields promising opportunities for the manipulation of spin waves in spin-caloritronic applications. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4767137]