Magnetic alloy material for use as magnetic cooling material or magnetostrictive material comprises

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The invention relates to a magnetic alloy material, having a composition of formula Fe_AOX14AO> c_AOX14AO 100-a-b -> RE_AOX14AO> a_AOX14AO> A_AOX14AO> b_AOX14AO> Co_AOX14AO> c_AOX14AO> has, wherein RE represents one rare earth element, which always comprises La, A is Si or Al, a, b, c represent mol constituent amount, respectively satisfy the relationship : I1 wherein the magnetic alloy material having either a two-phase dOLLAR -structure, which consists essentially of an alpha-Fe-phase and a phase (RE, VU, A)-, the 30 to 90 atomic % RE comprises, or a three-phase-structure, which consists essentially of the alpha-Fe-phase, the (RE, Fe, A)-phase, the 30 to 90 atomic % RE comprises, and (Fe, A) a RE _AOX14AO> 13_AOX14AO>-NaZn_AOX14AO having a crystal structure of joining step comprises> 13_AOX14AO>-type. The respective phases have a average size of the minor axis of 2 to 40 nm to [...].