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LaFe11.39Mn0.35Si1.26B0.1Hx alloys were prepared by hydrogenation. Samples were annealed at 1343 K for 30–90 h to form the NaZn13 phase. La-rich and α-Fe secondary phases were also detected. Saturated hydrogenation at 553 K and 0.15 MPa of H2 pressure for 5 h was employed to improve the Curie temperature of the alloys to 279 K. The maximum magnetic entropy change, relative cooling power, and adiabatic...
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