1. Room-temperature magnetocaloric properties of (La1-xNdx)2Fe10.7Mn0.3Si2Hy.
- Author
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Kim, Jihwan, Kim, Jeon, Kang, Ki Hoon, Kim, Jong-Woo, and Yoon, Chong Seung
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MAGNETIC entropy , *MAGNETIC cooling , *ADIABATIC temperature , *MAGNETIC transitions , *MAGNETIC properties , *MAGNETOCALORIC effects - Abstract
Magnetocaloric properties of (La 1- x Nd x) 2 Fe 10.7 Mn 0.3 Si 2 H y (x = 0.1 and 0.2) are evaluated to develop a room-temperature magnetic refrigerant. While Nd which is introduced to reduce the thermal hysteresis has a negligible effect on magnetic properties, the partial replacement of Fe with Mn converted the first-order magnetic transition to a second-order and T C is reduced by 50 K to near room temperature. The peak entropy change, Δ S M | pk values are 10.4 J kg−1 K−1 (at 290 K) for x = 0.1 and 10.6 J kg−1 K−1 (at 286 K) for x = 0.2 with μ 0 ∆ H = 3 T. The maximum values of the adiabatic temperature change, Δ T ad are 4.11 K (at 283 K) for x = 0.1 and 4.05 K (at 289 K) for x = 0.2 with μ 0 ∆ H = 1.4 T. Because T C can be shifted by the addition of Mn to room temperature, this series of compounds can be used as an efficient magnetic refrigerant or a combination as a composite refrigerant for an active magnetic refrigeration cycle. • (La 1- x Nd x) 2 Fe 10.7 Mn 0.3 Si 2 H y was synthesized for room-temperature magnetic refrigeration. • Mn addition reduced thermal hysteresis of hydrogenated La(FeSi) 13 alloys. • The peak Δ S M of LaFeSi-based alloys were measured to be 10.4 J kg−1 K−1 and 10.6 J kg−1 K−1. • Δ T ad of (La 1- x Nd x) 2 Fe 10.7 Mn 0.3 Si 2 H y (x = 0.1 and 0.2) was measured to be 4 K. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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