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首页> 外文期刊>Journal of Applied Physics >Preparation of metastable Sr_3Co_4O_9 epitaxial thin films with controlled orientation and their anisotropic thermoelectric properties
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Preparation of metastable Sr_3Co_4O_9 epitaxial thin films with controlled orientation and their anisotropic thermoelectric properties

机译：取向受控的亚稳态Sr_3Co_4O_9外延薄膜的制备及其各向异性热电性能

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摘要

We have prepared metastable misfit-type Sr_3Co_4O_9 epitaxial films by rf-planar magnetron sputtering. Anisotropic electric resistivity and Seebeck coefficient (parallel and perpendicular to the CoO_2 layers) were measured using a-axis-oriented Sr_3Co_4O_9 films where the layer structure stands perpendicularly to the substrate surface. The parallel resistivity exhibited considerable low value of about 2.5 mΩ cm at room temperature. Although the parallel Seebeck coefficient was a little lower than that of the Ca_3Co_4O_9 film at room temperature, the thermoelectric power factor was estimated to be two times higher than that of Ca_3Co_4O_9 owing to lower resistivity in Sr_3Co_4O_9.
机译：我们通过射频平面磁控溅射制备了亚稳态失配型Sr_3Co_4O_9外延膜。各向异性电阻率和塞贝克系数（平行于CoO_2且垂直于CoO_2层）使用a轴取向Sr_3Co_4O_9膜进行测量，其中层结构垂直于基板表面。在室温下，平行电阻率表现出相当低的大约2.5mΩcm的值。尽管在室温下平行塞贝克系数略低于Ca_3Co_4O_9膜，但是由于Sr_3Co_4O_9的电阻率较低，因此热电功率因数估计比Ca_3Co_4O_9的热电因数高两倍。

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