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Switching Effect in Transverse Thermopower in Bi Microwires

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dc.contributor.author KONOPKO, Leonid
dc.date.accessioned 2019-11-06T13:07:25Z
dc.date.available 2019-11-06T13:07:25Z
dc.date.issued 2011
dc.identifier.citation KONOPKO, Leonid. Switching Effect in Transverse Thermopower in Bi Microwires. In: Microelectronics and Computer Science: proc. of the 7th intern. Conf., September 22-24, 2011. Chişinău, 2011, vol. 1, pp. 91-94. ISBN 978-9975-45-174-1. en_US
dc.identifier.isbn 978-9975-45-174-1
dc.identifier.uri http://repository.utm.md/handle/5014/6243
dc.description.abstract At room temperature We have investigated the transverse thermopower in thin single-crystal bismuth microwires. The single-crystal nanowire samples in the diameter range 2 - 15 μm were prepared by the high frequency liquid phase casting in a glass capillary using an improved Ulitovsky technique; they were cylindrical single-crystals with (1011) orientation along the wire axis. In this orientation, the wire axis makes an angle of 19.5o with the bisector axis C1 in the bisector-trigonal plane. Bismuth microwire was placed between two polished aluminum plates, which were at different temperatures. At relative displacement of the plates the microwire was rotated around its axis. Transverse thermoelectric power varied by rotating microwires. The maximum thermoelectric power (Smax ~ 200 – 600 μV/K at the length of the plates L = 4.5 cm) occurred at the direction of the transverse temperature gradient along the C3 axis. For the first time significant difference was found in the values of the thermoelectric power after turning micrwires at 180 degrees (i.e. when the direction of the temperature gradient is reversed). The value of this switching effect, defined by us as (Smax-Smin) / (Smax + Smin), depends on the diameter d microwire and varies from 0.4 (for microwires with d = 14 μm) to 0.75 for microwires with d = 5 μm. Different assumptions about the nature of the observed effect will be discussed. en_US
dc.language.iso en en_US
dc.publisher Technical University of Moldova en_US
dc.rights Attribution-NonCommercial-NoDerivs 3.0 United States *
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/us/ *
dc.subject anisotropic thermoelements en_US
dc.subject microwires en_US
dc.subject switching effect en_US
dc.subject thermogenerators en_US
dc.subject transverse thermopower en_US
dc.subject thermopower en_US
dc.title Switching Effect in Transverse Thermopower in Bi Microwires en_US
dc.type Article en_US


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