About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
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Processing and Performance of Materials Using Microwaves, Electric and Magnetic Fields, Ultrasound, Lasers, and Mechanical Work – Rustum Roy Symposium
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| Presentation Title |
Wide two-transition magnetocaloric effect in Ho1-xCexNi (x = 0-0.1) from 4-35 K |
| Author(s) |
Casen Legreid, Ben Hilliard |
| On-Site Speaker (Planned) |
Casen Legreid |
| Abstract Scope |
Magnetic refrigeration is a promising alternative to conventional cryogenic refrigeration techniques, offering improved efficiency and sustainability. The application of a magnetic field induces substantial magnetic entropy change within magnetocaloric materials, leading to adiabatic temperature change near magnetic transitions. Recent research initiatives have pursued magnetic materials with transitions near the liquefaction point of helium (5 K). HoNi has attracted interest due to the proximity of its Curie point (35 K) and spin reorientation (13 K). However, only 15% of the peak entropy change is preserved at intermediate point 24 K, inhibiting the utility of leveraging both transitions in conjunction. This research demonstrates convergence of HoNi’s transitions with cerium substitutions, improving intermediate performance between transitions while increasing maximum entropy change to 3.0 J kg-1K-1 for Ho0.45Ce0.05Ni at 1 T. The resulting magnetocaloric effect exhibits strong cooling performance across temperature range 4-30 K, establishing HoCeNi as a compelling candidate for cost-effective helium liquefaction. |