| 摘要 |
A working component for magnetic heat exchange comprises a magnetocalorically active phase comprising La1-aRa(Fe1-x-yTyMx)13Hz, a hydrogen content, z, 90% or higher of a hydrogen saturation value, zsat, and values of a, x and y selected to give a Curie temperature Tc. M is one or more of the elements from the group consisting of Al and Si, T is one or more of the elements from the group consisting of Co, Ni, Mn, Cr, Cu, Ti and V and R is one or more of the elements from the group consisting of Ce, Nd, Y and Pr. Tcmax is a Curie temperature of a La1-aRa(Fe1-x-yTyMx)13Hz phase comprising a hydrogen content z=zsat and said selected values of a, x and y. The working component comprises the Tc wherein (Tcmax−Tc)≰20K.
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