SKM 2021 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 15: Posters Magnetism IV

MA 15.21: Poster

Donnerstag, 30. September 2021, 13:30–16:30, P

Large magnetic entropy change in Nd2In near the boiling temperature of natural gas — •Wei Liu¹, Franziska Scheibel¹, Tino Gottschall², Eduard Bykov², Imants Dirba¹, Konstantin Skokov¹, and Oliver Gutfleisch¹ — ¹Funktionale Materialien, Technische Universität, TU Darmstadt, Germany — ²Hochfeld- Magnetlabor Dresden, Helmholtz-Zentrum Dresden-Rossendorf, Germany

In the great transformation from fossil fuels to CO2-neutral renewable energies, the woldwide comsumption of liquid natural gas (LNG) is rising to facilitate the transition. Here we report a new firtst-order magnetocaloric material Nd2In with a negligible thermal hysteresis for magnetocaloric natural gas liquefaction. Nd2In shows a maximum magnetic entropy change of 7.42 J/kg K in fields of 2 T at 109 K with a fully reversible adiabatic temperature change of 1.13 K under a magnetic field change of 1.95 T. Studying thermal expansion and magnetostriction, a two-stage magnetic transition with a negligible volume change is observed. The longitudinal strain increases with magnetic fields and then decreases. This phenomenon may be a result of a pure electromic mechanism which may be the reason for the negligible thermal hysteresis. These interesting properties are useful for the practical design of a magnetocaloric natural gas liquefaction system. [1]

The work is supported by the Helmholtz-RSF joint research group (Project No. HRSF-0045) and DFG (Project No. 405553726-TRR 270, Germany).

[1] W. Liu et al., Appl. Phys. Lett. 119, 022408 (2021)