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Excellent magnetocaloric properties of melt-extracted Gd-based amorphous microwires
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Image of FIG. 1.
FIG. 1.

DSC curve of a Gd53Al24Co20Zr3 amorphous microwire. The inset shows a side-view image of the microwires.

Image of FIG. 2.
FIG. 2.

Temperature dependence of ZFC and FC magnetization taken at a field of 20 mT (a) for the bulk sample (for both “in-plane” and “out-of-plane” cases) and (b) for the microwires sample. The inset shows the magnetic hysteresis loop (M-H) of the microwires sample.

Image of FIG. 3.
FIG. 3.

Isothermal magnetization curves taken at different fixed temperatures between 5 K and 300 K ((a) and (b)) for the bulk sample (the “in-plane” and “out-of-plane” cases, respectively) and (c) for the microwires sample. The H/M vs. M 2 plots for representative temperatures around the TC for the (d) “in-plane,” (e) “out-of-plane,” and (f) “microwire” cases, respectively.

Image of FIG. 4.
FIG. 4.

Temperature dependence of magnetic entropy change (−ΔSM ) for different field changes up to 3 T (a) for the bulk sample (the “out-of-plane” case) and (b) for the microwires sample. Magnetic field dependences of maximum magnetic entropy change (Δ) (Fig. 4(c)) and RC (Fig. 4(d)) for all the “in-plane,” “out-of-plane,” and ‘microwire” cases.


Generic image for table
Table I.

Maximum entropy change, , peak temperature, T p, and RC, for the present samples and other magnetocaloric candidate materials (Bulk Glasses) in the temperature range of 10–100 K. Gd and Gd5Si2Ge1.9Fe0.1 are also included for reference.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Excellent magnetocaloric properties of melt-extracted Gd-based amorphous microwires