Takahashi, KoukiMiyazaki, HidetoshiKimura, KojiOzkendir, Osman MuratNishino, YoichiHayashi, Kouichi2025-03-172025-03-1720220370-19721521-3951https://doi.org/10.1002/pssb.202100602https://hdl.handle.net/20.500.13099/2396The local structure around doping Ta atoms in Fe2V1-xTaxAl alloys is investigated using X-ray absorption fine-structure (XAFS) and synchrotron radiation X-ray diffraction (SR-XRD) measurements to elucidate the origin of the reduction in their thermal conductivity. XAFS and SR-XRD results show that with the substitution of Ta atoms at the V site, local strain exists around the doped Ta atoms. The reduction in the thermal conductivity due to Ta doping in the Fe2V1-xTaxAl alloys is attributed to the increase in the average atomic mass substituted with the heavy element Ta as well as the existence of the local strain.eninfo:eu-repo/semantics/closedAccessHeusler alloyslocal structureTa-doped Fe2VAlX-ray absorption fine structureX-ray diffractionArticle10.1002/pssb.2021006022599Q3WOS:0007727851000012-s2.0-85127303999Q3