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Magnetic properties and magnetic entropy changes of La(Fe_(1-x)Mn_x)_(11.5)Si_(1.5)H_y compounds are investigated. Their Curie temperatures are adjusted to room temperature by partial Mn substitution for Fe and hydrogen absorption in 1-atm(1 atm = 1.01325×10~5Pa) hydrogen gas. Under a field change from 0 T to 2 T, the maximum magnetic entropy change for La(Fe_(0.99)Mn_(0.01))_(11.5)Si_(1.5)H_(1.61)is-11.5 J/kg. The suitable Curie temperature and large value of ?S_m make it an attractive potential candidate for the room temperature magnetic refrigeration application.
Magnetic properties and magnetic entropy changes of La (Fe_ (1-x) Mn_x) _ (11.5) Si_ (1.5) H_y compounds are investigated. Their Curie temperatures are adjusted to room temperature by partial Mn substitution for Fe and hydrogen absorption in 1- (1.5) Si (1.5) atm (1 atm = 1.01325 × 10 -5 Pa) hydrogen gas. Under a field change from 0 T to 2 T, the maximum magnetic entropy change for La H_ (1.61) is-11.5 J / kg. The suitable Curie temperature and large value of? S_m make it an attractive potential candidate for the room temperature magnetic refrigeration application.