Abstract Scope |
The magnetocaloric effect (MCE) of high-entropy alloys (HEAs) was, until recently, restricted to low-temperatures or giving sub-par performance. Compositions diluted the moment of ferromagnetic elements (including rare-earth (RE) elements), resembling “too many cooks spoil the broth”. Extending to the second-generation HEAs beyond the equiatomic point towards non-equiatomic HEA region, a directed search strategy yields a ≥ 5-fold MCE performance enhancement without RE reliance. In this talk, we will overview the design strategy of magnetocaloric HEAs that allowed to obtain this remarkable enhancement, closing the gap between HEAs and conventional MCE materials.
Supported by Grant PID2019-105720RB-I00 funded by MCIN/AEI/10.13039/501100011033 and US Air Force Office of Scientific Research (FA8655-21-1-7044).
[1] J. Y. Law, V. Franco, “Pushing the limits of magnetocaloric high entropy alloys”, APL Materials 9, 080702 (2021).
[2] J.Y. Law, et al., Acta Materialia 212, 116931 (2021).
[3] J.Y. Law, et al., Journal of Alloys and Compounds 855, 157424 (2021). |