Influence of annealing on the magnetic entropy changes in Fe81.6Mo4Zr3.3Nb3.3B6.8Cu1 amorphous ribbons

A constant magnetocaloric response in FeMoCuB amorphous alloys with different Fe∕B ratios

“…8 Recently, there is a growing interest in studying the applicability of soft magnetic amorphous alloys as magnetic refrigerants. [9][10][11][12][13][14][15][16] Albeit the maximum magnetic entropy change, ͉⌬S M pk ͉, for these alloys is modest when compared to that of rare-earth-based materials, the remarkable difference in material costs is an incentive for studying their suitability as magnetic refrigerants. Besides their reduced magnetic hysteresis ͑virtually negligible͒, the high electrical resistivity ͑which would decrease eddy current losses͒, tunable Curie temperature, and, in the case of bulk amorphous alloys, [17][18][19][20] outstanding mechanical properties are beneficial characteristics for a successful application of the material.…”

Enhanced magnetocaloric response in Cr∕Mo containing Nanoperm-type amorphous alloys

“…The refrigerant capacity ͑RC͒ for the Mo-containing alloy is comparable to that of Gd 5 Ge 1. 9 Si 2 Fe 0.1 ͑for a field of 50 kOe, RC = 273 J kg −1 for the Mo alloy vs 240 J kg −1 for the Gd-based one͒, with a larger temperature span of the optimal refrigeration cycle ͑250 K vs 90 K, respectively͒. The restriction of the temperature span to 90 K gives RC= 187 J kg −1 for the Mo alloy.…”

“…In particular, there is a growing interest in studying the applicability of soft magnetic amorphous alloys as magnetic refrigerants [9][10][11][12][13][14][15][16][17][18][19][20] due to their reduced magnetic hysteresis ͑vir-tually negligible͒, higher electrical resistivity ͑which would decrease eddy current losses͒, and tunable Curie temperature T Curie . Among the different compositional series of soft magnetic amorphous alloys, Nanoperm-type alloys are those that currently exhibit the highest RC values, having also among the highest values of ͉⌬S M pk ͉.…”

Influence of Co addition on the magnetocaloric effect of FeCoSiAlGaPCB amorphous alloys

“…6 The search for low-cost materials for high-temperature magnetic refrigeration is a field of current interest. [7][8][9][10][11][12] Recently it has been shown that some soft-magnetic amorphous alloys are good candidates for this application, 11 with a refrigerant capacity that is comparable to that of low-hysteretic Gd-based materials. 4 It has also been shown that the nanocrystallization of the alloy, although broadening the ⌬S M peak, does not improve the RC of the material.…”