Year: 1997
Type: article
Abstract: Electric generator by the Nernst effect in a strong magnetic field, which is called a Nernst element, was proposed in a few years ago. We have developed a measuring system of transport coefficients, which are the thermoelectric coefficient α and the Nernst coefficient N, to find the Nernst element which has a good figure of merit. We obtained the temperature T and the magnetic field B dependence of both α and N of InSb, which has a high mobility and which is one of candidates of the Nernst elements, when 263 K≤T≤373 K and B≤4 T. We measured two types of InSb samples, which we called sample A and sample B. Their carrier concentrations at 77 K are n=2.1×1022 m−3 and n=2.9×1021 m−3, respectively. This measurement gives the following two important results: (i) Both α and N of sample B, which is in the intrinsic region near room temperature, are higher than those of sample A. (ii) the N of both samples are proportional to B up to 4 T. This fact is inconsistent with theoretical result, that is, N∝1⁄B2.
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2606034144