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<p>The structural, morphological, thermal, electrical, thermoelectrical and magnetic properties of Mn<sub>2</sub>VAl Heusler alloy particles were systematically investigated. The Rietveld refinement confirms the formation of L2<sub>1</sub> structure for&#xa0;the sample annealed at 900&#xa0;°C for 96&#xa0;h. In addition the prepared alloy thermally stable up to 900&#xa0;°C, confirmed by thermogravimetric analysis it resembles extreme thermal stability. Hall measurement shows a positive carrier concentration correlates p-type conducting behaviour and the bandgap found to be 1.18&#xa0;eV. The alloy exhibits maximum power factor value of 247.28 μWcm<sup>−1</sup>&#xa0;K<sup>−2</sup> at 573&#xa0;K. The magnetic measurement shows ferrimagnetic nature with low coercivity characteristics of soft magnetic nature. Notably, the Curie temperature was found to be 793&#xa0;K significantly higher than previous reported theoretically and experimentally values for Mn<sub>2</sub>VAl Heusler alloy. The combination of low magnetization, high Curie temperature and small energy consumption for magnetization switching suggests that Mn<sub>2</sub>VAl is a promising candidate for spin injection and spintronics devices applications.</p>

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Multifaceted investigation of soft ferrimagnetic p-type Mn2VAl Heusler alloy for spintronic applications

  • 期刊论文

  • 发表日期：

    2025年12月11日

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  • R. Chellakumar,
  • A. Sampathu,
  • R. Ramarajan,
  • K. Ravichandran

摘要

The structural, morphological, thermal, electrical, thermoelectrical and magnetic properties of Mn2VAl Heusler alloy particles were systematically investigated. The Rietveld refinement confirms the formation of L21 structure for the sample annealed at 900 °C for 96 h. In addition the prepared alloy thermally stable up to 900 °C, confirmed by thermogravimetric analysis it resembles extreme thermal stability. Hall measurement shows a positive carrier concentration correlates p-type conducting behaviour and the bandgap found to be 1.18 eV. The alloy exhibits maximum power factor value of 247.28 μWcm−1 K−2 at 573 K. The magnetic measurement shows ferrimagnetic nature with low coercivity characteristics of soft magnetic nature. Notably, the Curie temperature was found to be 793 K significantly higher than previous reported theoretically and experimentally values for Mn2VAl Heusler alloy. The combination of low magnetization, high Curie temperature and small energy consumption for magnetization switching suggests that Mn2VAl is a promising candidate for spin injection and spintronics devices applications.