Article Enhanced thermoelectric performance of p-type BiSbTe through incorporation of magnetic CrSb

Raphael Fortulan ; Suwei Li ; Michael John Reece ; Illia Serhiienko SAMURAI ORCID (National Institute for Materials ScienceROR) ; Takao Mori SAMURAI ORCID (National Institute for Materials ScienceROR) ; Sima Aminorroaya Yamini

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Raphael Fortulan, Suwei Li, Michael John Reece, Illia Serhiienko, Takao Mori, Sima Aminorroaya Yamini. Enhanced thermoelectric performance of p-type BiSbTe through incorporation of magnetic CrSb. Applied Physics Letters. 2024, 125 (20), 203903. https://doi.org/10.1063/5.0235499
SAMURAI

Description:

(abstract)

This study investigates the thermoelectric properties of p-type Bi0.5Sb1.5Te3 with added 10% Te composites containing a varying ratio of the ferromagnetic semiconductor of CrSb (0, 0.125, 0.5, and 1 wt.%) as a secondary phase. Samples were synthesized by a combination of ball milling and spark plasma sintering techniques. The incorporation of CrSb particles resulted in an increase in thermopower due to an increase in the effective mass of the charge carriers, indicating that there is a drag effect originating from the magnetic particles. However, this was at the expense of reduced electrical conductivity due to reduced carrier mobility. While overall only marginal improvements in power factors were observed, the multiphase samples exhibited significantly lower thermal conductivity compared to the single-phase material. As a result, a peak zT value of ∼1.4 was achieved at 325 K for the sample with 0.125 wt.% CrSb. The synergistic effects of magnetically induced thermopower enhance- ment and thermal conductivity reduction resulted in showing the potential of incorporating magnetic secondary phases to optimize the thermoelectric performance in this system

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  • In Copyright

    This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Appl. Phys. Lett. 125, 203903 (2024) and may be found at https://doi.org/10.1063/5.0235499.

Keyword: thermoelectric

Date published: 2024-11-11

Publisher: AIP Publishing

Journal:

  • Applied Physics Letters (ISSN: 00036951) vol. 125 issue. 20 203903

Funding:

  • European Union's Horizon 2020 801604
  • Engineering and Physical Sciences Research Council EP/R00661X/1
  • Engineering and Physical Sciences Research Council EP/S019367/1
  • Engineering and Physical Sciences Research Council EP/P025021/1
  • Engineering and Physical Sciences Research Council and EP/P025498/1
  • JST Mirai Program JPMJMI19A1
  • JST SPRING JPMJSP2124

Manuscript type: Author's version (Submitted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5022

First published URL: https://doi.org/10.1063/5.0235499

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Updated at: 2024-11-25 16:30:26 +0900

Published on MDR: 2024-11-25 16:30:26 +0900

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