CE50 - Sciences de base pour l’énergie

ISing gArnet hyperKagomE networks for enhanced magnetocaloric effect – SAKE

Submission summary

Alternate coolants are needed to replace the use of increasingly scarce liquid helium, required, for instance, to cool the superconducting magnets used in medical resonance imaging. Magnetocaloric materials, with their entropically driven cooling power when cycled in a magnetic field, are such a replacement. The gadolinium-based garnets developed recently show amongst the largest magnetocaloric effects ; yet the cooling power of those materials peaks below 2 K, too low for many applications of liquid helium. The aim of the SAKÉ project is to find new rare-earth garnets with better magnetocaloric performances, by adequate substitutions on the three available cationic sites of the garnet structure. The project originality is the investigation of high-entropy garnet oxides to achieve this goal. Moreover, the chosen consortium offers an unmatched expertise in neutron scattering techniques, which will be a key asset to correlate chemical substitutions with changes in magnetic anisotropy and ground states in applied magnetic field, for an in-depth understanding of the key parameters controlling the magnetocaloric effect.

Project coordinator

Madame Françoise DAMAY (Laboratoire Léon Brillouin)

The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.


LLB Laboratoire Léon Brillouin
UPSACLAY / ICMMO Institut de Chimie Moléculaire et des Matériaux d'Orsay

Help of the ANR 283,824 euros
Beginning and duration of the scientific project: October 2022 - 48 Months

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