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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

権利情報:

• 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.

キーワード: thermoelectric

刊行年月日: 2024-11-11

出版者: AIP Publishing

掲載誌:

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

研究助成金:

• 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

原稿種別: 査読前原稿 (Author's original)

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

公開URL: https://doi.org/10.1063/5.0235499

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更新時刻: 2024-11-25 16:30:26 +0900

MDRでの公開時刻: 2024-11-25 16:30:26 +0900