Physica B: Condensed Matter ( IF 2.8 ) Pub Date : 2020-12-17 , DOI: 10.1016/j.physb.2020.412761 Tetsuji Saito , Daisuke Nishio-Hamane
Magnetic measurements confirmed that the Co2MnSi Heusler compound is a superior ferromagnetic material to the Co2MnGa Heusler compound. The Co2MnGa Heusler compound showed a saturation magnetization of 81.3 emu/g and a Curie temperature of 700 K, while the Co2MnSi Heusler compound exhibited both a high saturation magnetization of 130 emu/g and a high Curie temperature of 1015 K. Thermoelectric measurements revealed that the Co2MnSi Heusler compound is also a superior thermoelectric material to the Co2MnGa Heusler compound. The Co2MnGa Heusler compound showed a large Seebeck coefficient of −35.2 μV/K and a low electrical resistivity value of 1.30 μΩm at room temperature, while the Co2MnSi Heusler compound showed values of −14.3 μV/K and 0.198 μΩm, respectively. A power factor of 1800 μW/mK2 at 600 K was obtained in the Co2MnSi Heusler compound, which is comparable to or higher than that of the well-known Fe2VAl Heusler compound.
中文翻译:
Co 2 MnT(T = Ga,Si)Heusler化合物的磁和热电性质
磁性测量证实,Co 2 MnSi Heusler化合物是优于Co 2 MnGa Heusler化合物的铁磁材料。Co 2 MnGa Heusler化合物的饱和磁化强度为81.3 emu / g,居里温度为700 K,而Co 2 MnSi Heusler化合物的饱和磁化强度为130 emu / g,居里温度为1015K。热电测量表明,Co 2 MnSi Heusler化合物也是优于Co 2 MnGa Heusler化合物的热电材料。钴2MnGa Heusler化合物在室温下显示大的塞贝克系数,为-35.2μV/ K,低电阻率值为1.30μΩm,而Co 2 MnSi Heusler化合物的显示值分别为-14.3μV/ K和0.198μΩm。在Co 2 MnSi Heusler化合物中,在600 K下获得了1800μW/ mK 2的功率因数,该功率因数与公知的Fe 2 VAl Heusler化合物相当或更高。