K. Sugiura, H. Ohta, K. Nomura, T. Saito, Y. Ikuhara, M. Hirano, H. Hosono, K. Koumoto
{"title":"Thermoelectric Properties of Epitaxial Films of Layered Cobalt Oxides Fabricated by Topotactic Ion-Exchange Methods","authors":"K. Sugiura, H. Ohta, K. Nomura, T. Saito, Y. Ikuhara, M. Hirano, H. Hosono, K. Koumoto","doi":"10.1109/ICT.2006.331290","DOIUrl":null,"url":null,"abstract":"Epitaxial film of a layered cobalt oxide, Ca<sub>3</sub>Co<sub>4 </sub>O<sub>9</sub>, was fabricated on a (0001)-face of alpha-Al<sub>2 </sub>O<sub>3</sub> substrate by a topotactic ion exchange method using a Na<sub>0.8</sub>CoO<sub>2</sub> epitaxial film as a precursor. High-resolution X-ray diffraction and atomic force microscope measurements revealed that the film was high-quality (001)-oriented Ca <sub>3</sub>Co<sub>4</sub>O<sub>9</sub> with stepped & terraced surface morphology. The film exhibits a high electrical conductivity of 2.95 times 10<sup>2</sup> Scm<sup>-1</sup> and a large Seebeck coefficient of ~+125 muVK<sup>-1</sup>, which leads to the thermoelectric power factor of 4.5 times 10<sup>-4</sup> Wm<sup>-1 </sup>K<sup>-1</sup> at 300 K","PeriodicalId":346555,"journal":{"name":"2006 25th International Conference on Thermoelectrics","volume":"39 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2006-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2006 25th International Conference on Thermoelectrics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICT.2006.331290","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
Epitaxial film of a layered cobalt oxide, Ca3Co4 O9, was fabricated on a (0001)-face of alpha-Al2 O3 substrate by a topotactic ion exchange method using a Na0.8CoO2 epitaxial film as a precursor. High-resolution X-ray diffraction and atomic force microscope measurements revealed that the film was high-quality (001)-oriented Ca 3Co4O9 with stepped & terraced surface morphology. The film exhibits a high electrical conductivity of 2.95 times 102 Scm-1 and a large Seebeck coefficient of ~+125 muVK-1, which leads to the thermoelectric power factor of 4.5 times 10-4 Wm-1 K-1 at 300 K
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
