%0 Journal Article %1 Liu_2023 %A Liu, Wei %A Gottschall, Tino %A Scheibel, Franziska %A Bykov, Eduard %A Fortunato, Nuno %A Aubert, Alex %A Zhang, Hongbin %A Skokov, Konstantin %A Gutfleisch, Oliver %D 2023 %I IOP Publishing %J J. High Energy Phys. %K b %N 3 %P 034001 %R 10.1088/2515-7655/accb0b %T Designing magnetocaloric materials for hydrogen liquefaction with light rare-earth Laves phases %U https://dx.doi.org/10.1088/2515-7655/accb0b %V 5 %X Magnetocaloric hydrogen liquefaction could be a ‘game-changer’ for liquid hydrogen industry. Although heavy rare-earth based magnetocaloric materials show strong magnetocaloric effects in the temperature range required by hydrogen liquefaction (77–20 K), the high resource criticality of the heavy rare-earth elements is a major obstacle for upscaling this emerging liquefaction technology. In contrast, the higher abundances of the light rare-earth elements make their alloys highly appealing for magnetocaloric hydrogen liquefaction. Via a mean-field approach, it is demonstrated that tuning the Curie temperature (T C) of an idealized light rare-earth based magnetocaloric material towards lower cryogenic temperatures leads to larger maximum magnetic and adiabatic temperature changes (ΔS T and ΔT ad). Especially in the vicinity of the condensation point of hydrogen (20 K), ΔS T and ΔT ad of the optimized light rare-earth based material are predicted to show significantly large values. Following the mean-field approach and taking the chemical and physical similarities of the light rare-earth elements into consideration, a method of designing light rare-earth intermetallic compounds for hydrogen liquefaction is used: tuning T C of a rare-earth alloy to approach 20 K by mixing light rare-earth elements with different de Gennes factors. By mixing Nd and Pr in Laves phase (Nd, Pr)Al2, and Pr and Ce in Laves phase (Pr, Ce)Al2, a fully light rare-earth intermetallic series with large magnetocaloric effects covering the temperature range required by hydrogen liquefaction is developed, demonstrating a competitive maximum effect compared to the heavy rare-earth compound DyAl2.

@article{Liu_2023, abstract = {Magnetocaloric hydrogen liquefaction could be a ‘game-changer’ for liquid hydrogen industry. Although heavy rare-earth based magnetocaloric materials show strong magnetocaloric effects in the temperature range required by hydrogen liquefaction (77–20 K), the high resource criticality of the heavy rare-earth elements is a major obstacle for upscaling this emerging liquefaction technology. In contrast, the higher abundances of the light rare-earth elements make their alloys highly appealing for magnetocaloric hydrogen liquefaction. Via a mean-field approach, it is demonstrated that tuning the Curie temperature (T C) of an idealized light rare-earth based magnetocaloric material towards lower cryogenic temperatures leads to larger maximum magnetic and adiabatic temperature changes (ΔS T and ΔT ad). Especially in the vicinity of the condensation point of hydrogen (20 K), ΔS T and ΔT ad of the optimized light rare-earth based material are predicted to show significantly large values. Following the mean-field approach and taking the chemical and physical similarities of the light rare-earth elements into consideration, a method of designing light rare-earth intermetallic compounds for hydrogen liquefaction is used: tuning T C of a rare-earth alloy to approach 20 K by mixing light rare-earth elements with different de Gennes factors. By mixing Nd and Pr in Laves phase (Nd, Pr)Al2, and Pr and Ce in Laves phase (Pr, Ce)Al2, a fully light rare-earth intermetallic series with large magnetocaloric effects covering the temperature range required by hydrogen liquefaction is developed, demonstrating a competitive maximum effect compared to the heavy rare-earth compound DyAl2.}, added-at = {2023-11-22T18:12:15.000+0100}, author = {Liu, Wei and Gottschall, Tino and Scheibel, Franziska and Bykov, Eduard and Fortunato, Nuno and Aubert, Alex and Zhang, Hongbin and Skokov, Konstantin and Gutfleisch, Oliver}, biburl = {https://www.bibsonomy.org/bibtex/2b32dfa0e332f1e35bfd7af412531751d/ctqmat}, day = 05, doi = {10.1088/2515-7655/accb0b}, interhash = {cc0134ecb17518a11244bd429c7c2eac}, intrahash = {b32dfa0e332f1e35bfd7af412531751d}, journal = {J. High Energy Phys.}, keywords = {b}, month = {05}, number = 3, pages = 034001, publisher = {IOP Publishing}, timestamp = {2023-11-22T18:12:15.000+0100}, title = {Designing magnetocaloric materials for hydrogen liquefaction with light rare-earth Laves phases}, url = {https://dx.doi.org/10.1088/2515-7655/accb0b}, volume = 5, year = 2023 }