Competitive driving effect on calorics by dual-fields in ferroic materials with strong magnetostructural coupling

Multicaloric Cryocooling Using Heavy Rare-Earth Free La(Fe,Si)13-Based Compounds

“…We have selected a La­(Fe,Si) 13 -based compound, namely, La 0.7 Ce 0.3 Fe 11.6 Si 1.4 , as the model material system since these compounds show magnetic field-induced itinerant-electron metamagnetic transitions accompanied by giant magnetocaloric effects ,− and are highly susceptible to isotropic pressure application. ,− So far, the effect of isotropic pressure has mainly been investigated regarding fundamental research questions in the parent ternary or hydrogenated La­(Fe,Si) 13 system, e.g., in the framework of the Bean–Rodbell model or by investigating the effect of isotropic pressure on general material properties, − , including the magnetocaloric effect. ,, Application-related studies involving other stimuli than the magnetic field have focused on room temperature implementations, e.g., by investigating barocaloric cooling with La­(Fe,Co,Si) 13 or La 1.2 Ce 0.8 Fe 11 Si 2 H 1.86 and the mechanical stimulus-assisted magnetocaloric effect of La­(Fe,Si) 13 H z , La­(Fe,Co,Si) 13 , or La­(Fe,Mn,Si) 13 H z . The focus of conducting multicaloric studies around room temperature is also evident for other multiferroic material systems, such as Fe–Rh-based compounds, Mn–Ni–Ge compounds, and Ni–Mn-based Heusler alloys. − Hitherto, studies at cryogenic temperatures using the La­(Fe,Si) 13 material system investigated either solely the magnetocaloric effect or thermal expansion properties. , Therefore, to the best of our knowledge, the combination of multiple stimuli exploring the potential, challenges, and peculiarities of multicaloric cooling in the context of gas liquefaction at cryogenic temperatures, using La 0.7 Ce 0.3 Fe 11.6 Si 1.4 for demonstration purposes, has not been reported in the literature.…”