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The influence of magnetic field on thermoelectric properties of a composite based on Bi2Te2.1Se0.9 with a ferromagnetic filler (Co)
Russian version
Batdalov A. B. 1, Mukhuchev A. A. 1, Yaprintsev M. N. 2, Ivanov O. N.2, Khovaylo V. V. 3
1Amirkhanov Institute of Physics, Daghestan Federal Research Center, Russian Academy of Sciences, Makhachkala, Russia
2Belgorod National Research University, Belgorod, Russia
3National University of Science and Technology MISiS, Moscow, Russia
Email: ab.batdalov@gmail.com, mukhuch87@mail.ru
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The results of the study of the influence of a magnetic field on the thermal conductivity, thermoelectric power and electrical resistance of a composite based on a Bi2Te2.1Se0.9 thermoelectric (matrix) and a magnetically ordered filler (cobalt) are presented. It is shown that the introduction of a small amount of Co atoms (0.33 wt.%) into the thermoelectric matrix leads to a significant increase in the thermoelectric figure of merit ZT (~40 %). Analysis of the temperature and magnetic field dependence of the electrical resistance of the composite indicates electrical heterogeneity of the composite. The magnetic field leads to an increase in electrical resistance, a decrease in thermoelectric power and its thermal conductivity, which ultimately lead to an insignificant decrease in the thermoelectric figure of merit. Keywords: thermoelectrics, magnetic field, temperature, thermoelectric figure of merit.
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