Influence of Ni on the magnetocaloric effect in Nanoperm-type soft-magnetic amorphous alloys

•Preparation of melt spun amorphous Nanoperm soft-magnetic amorphous alloys with Ni.•The magnetocaloric effect increases for 25% compared to the Ni-free sample.•All magnetic entropy change curves show a master-curve behavior.•The dependence of TC, ΔSMpk and RC does not follow a power law. We have st...

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Bibliographic Details
Published in:Journal of alloys and compounds 2014-04, Vol.591, p.29-33
Main Authors: Podmiljsak, B., Kim, J.-H., McGuiness, P.J., Kobe, S.
Format: Article
Language:English
Subjects:
Alloys
Amorphous materials
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Curie temperature
Entropy
Exact sciences and technology
Magnetic properties and materials
Magnetic transitions
Magnetically ordered materials: other intrinsic properties
Magnetization
Magnetocaloric effect
Magnetocaloric effect, magnetic cooling
Nanostructure
Nickel
Nickel base alloys
Physics
Rapid-solidification
Refrigerant capacity
Refrigerators
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Summary:•Preparation of melt spun amorphous Nanoperm soft-magnetic amorphous alloys with Ni.•The magnetocaloric effect increases for 25% compared to the Ni-free sample.•All magnetic entropy change curves show a master-curve behavior.•The dependence of TC, ΔSMpk and RC does not follow a power law. We have studied the influence of Ni on the magnetocaloric effect (MCE) in Nanoperm-type amorphous materials by investigating a series of Fe84−xNixZr6B10 alloys with x=0, 2, 4 and 6. As expected, the Curie temperature increased with the amount of Ni from 427K for x=0 to 482K for x=6. The maximum magnetic entropy change (ΔSMpk) for an applied field of 1.4T also increased, reaching a value of 1.52J/Kkg for x=6, which is an increase of 25% compared to the Ni-free alloy. The refrigerant capacity first decreased for x=2 and then increased, reaching a maximum value of 93J/kg (ΔH=1.4T) for x=6. For a 5T field change, the value increased to 407J/kg, which is higher than the 355J/kg achieved with Gd5Ge1.9Si2Fe0.1. We confirmed the proposed “master curve” behavior for second-order magnetic transition (SOMT) alloys for the temperature dependence of ΔSM for different alloy compositions of the same series, which makes it easier and faster to find proper candidates for a magnetic refrigerator.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2013.12.150