| 简介 |
Provided is a magnetic refrigeration material that drastically exceeds conventional refrigeration performance at a Curie temperature close to or higher than room temperature and a density as high as almost 2 Tesla, below which a magnetic field is considered changeable with a permanent magnet. This magnetic refrigeration material is made of a composition expressed by formula La1-fREf (Fe1-a-b-c-d-eSiaCobXcYdZe)13 (RE : at least one kind of rare-earth element including Sc and Y with the exclusion of La; X : Ga and/or Al; Y : at least one kind selected from among Ge, Sn, B, and C; and Z : at least one kind selected from among Ti, V, Cr, Mn, Ni, Cu, Zn, and Zr. 0.03 ≤ a ≤ 0.17, 0.003 ≤ b ≤ 0.06, 0.02 ≤ c ≤ 0.10, 0 ≤ d ≤ 0.04, 0 ≤ e ≤ 0.04, 0 ≤ f ≤ 0.50), and which exhibits the Tc being between 220K and 276K and the maximum value (-ΔSmax) of the magnetic entropy change amount (-ΔSM) with respect to a magnetic field change up to 2 Tesla being 5J/kgK or higher. |
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