Observation of the giant magneto-Seebeck effect in a metastable Co50Fe50/Cu multilayer
Observation of the giant magneto-Seebeck effect in a metastable Co50Fe50/Cu multilayer
复制标题
DOI：
10.1063/5.0118382
复制
发表时间：
2022-10
影响因子：
4
通讯作者：
T. Hirai;Y. Sakuraba;K. Uchida
中科院分区：
文献类型：
--
作者：
T. Hirai;Y. Sakuraba;K. Uchida
我们报道了在面内温度梯度下外延生长的具有亚稳态bcc Cu间隔层的Co_（50）Fe_（50）/Cu多层膜中的巨磁塞贝克（GMS）效应。在室温下，Seebeck系数的磁化相关开关比、GMS比和热电功率因数的开关比分别达到约-50%和280%，这高于先前报道的具有面内电流几何结构的磁性多层膜。通过测量GMS和巨磁电阻（GMR）效应的温度依赖性，我们发现GMS比在高温下保持很高，而GMR比随着温度的升高而迅速降低，其中自旋相关的电子散射主要影响Co 50 Fe 50/Cu多层膜中的大GMS效应。
We report the observation of the giant magneto-Seebeck (GMS) effect in an epitaxially grown Co50Fe50/Cu multilayer film with metastable bcc Cu spacers under an in-plane temperature gradient. The magnetization-dependent switching ratio of the Seebeck coefficient, GMS ratio, and switching ratio of the thermoelectric power factor reach approximately −50% and 280% at room temperature, respectively, which are higher than those previously reported in magnetic multilayers with the current-in-plane geometry. By measuring the temperature dependence of both GMS and giant magnetoresistance (GMR) effects, we found that the GMS ratio remains high at high temperatures, while the GMR ratio quickly decreases with increasing temperature, where the spin-dependent electron scattering dominantly affects the large GMS effect in the Co50Fe50/Cu multilayer.