Chemical composition dependent local lattice distortions and magnetism in high entropy alloys

A distinguish feature of high-entropy alloys (HEAs) is well-defined crystalline structure with chemical disorder. While, local lattice distortion a longstanding issue in HEAs and more challenging than traditional alloys. However, reports on are rarely related to compositions. Here, we use synchrotron radiation facility based XRD X-ray absorption fine (XAFS) examine averaged element specified distortions CrCoNi medium-entropy alloy (MEA), CrFeCoNi CrMnFeCoNi HEAs. The results showed that observed from patterns subtle. magnitude centred around certain alloying XAFS spectra keeps the same order, generally, Ni > Co Fe Cr Mn. positive strains proposed counteract negative thus leading observation subtle distortion. XANES suggested electron flexibility might be one factor contributes distortions. magnetic measurements indicated paramagnetic state all studied at ambient conditions. This study provides key information its correlations compositions HEAs, which crucial importance tailoring properties advanced other multicomponent