A setup to measure the Seebeck coefficient and electrical conductivity of anisotropic thin-films on a single sample
| Autor: | Mariano Campoy-Quiles, Osnat Zapata-Arteaga, Bernhard Dörling |
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| Přispěvatelé: | Ministerio de Ciencia, Innovación y Universidades (España), Generalitat de Catalunya, European Research Council |
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics Doping Isotropy 01 natural sciences Measure (mathematics) 3. Good health 010305 fluids & plasmas Van der Pauw method Electrical resistivity and conductivity Seebeck coefficient 0103 physical sciences Thin film Anisotropy Instrumentation |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname Review of Scientific Instruments |
| Popis: | This work documents an all-in-one custom setup, that allows to measure the in-plane Seebeck coefficients and electrical conductivities of anisotropic thin film samples close to room temperature. Both pairs, Sk,σk, and S⊥ and σ⊥ can be measured using four contacts on the same sample, reducing measurement time and minimizing potential sources of error due to aggregating data from several distinct samples. The setup allows to measure the electrical conductivity of isotropic samples using the well-known van der Pauw method. For samples with in-plane anisotropy, the two components σk and σ⊥ can be extracted from the same type of measurements by performing additional calculations. Using the same contacts, the Seebeck coefficient along one direction is measured using a differential state-state method. After rotating the sample by 90◦ , the orthogonal Seebeck component can be measured. In order to show the generality of the method, we measure different types of samples, from metal references to oriented doped conjugated polymers. The authors would like to thank José P. Jurado for helpful discussions and Rafael León for his help designing and machining the sample holder. The authors acknowledge the financial support from the Spanish Ministry of Science and Innovation through the “Severo Ochoa” Program for Centers of Excellence in R&D (Grant No. SEV-2015-0496 and Grant No. PGC2018-095411-B-I00), from the Generalitat de Catalunya, through Grant No. AGAUR 2018 PROD 00191, and from the European Research Council (ERC), under Grant Agreement No. 648901. O.Z.-A. acknowledges CONACYTSENER for his Ph.D. scholarship (Grant No. 472571). |
| Databáze: | OpenAIRE |
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