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Magnetocaloric effect contributed by in situ dual-phase structure in the Gd-Co-Al alloy
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Image of FIG. 1.
FIG. 1.

(Color online) XRD patterns (crosses) and the Rietveld refinement profiles (solid line) for the GdCo0.65Al1.35 alloy. The upper and the lower sets of vertical bars correspond to the calculated Bragg peaks of the GdCo0.74Al1.26 and GdAl2 phases, respectively. RP , R wp, RB , and χ2 are the profile residual, weighted profile residual, the Bragg residual, and the goodness of fit, respectively.

Image of FIG. 2.
FIG. 2.

The backscattered electron image of the as-cast GdCo0.65Al1.35 alloy. The black dots in the picture correspond to the holes in the sample.

Image of FIG. 3.
FIG. 3.

(Color online) Temperature dependencies of magnetization of the as-cast GdCo0.65Al1.35 alloy with a 1 kOe applied field upon heating. The inset shows the inverse susceptibility-temperature data.

Image of FIG. 4.
FIG. 4.

(Color online) Magnetization isotherms of GdCo0.65Al1.35 alloy at temperatures between 2 and 150 K (a) and temperature dependencies of magnetic entropy changes (−ΔS M) for the magnetic field changes from 0 to 50 kOe and 0 to 20 kOe (b).


Generic image for table
Table I.

The structure, the density, the proportion, the lattice parameters, and the composition of the GdCo0.74Al1.26 and GdAl2 phases determined by Rietveld refinement for the GdCo0.65Al1.35 alloy.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Magnetocaloric effect contributed by in situ dual-phase structure in the Gd-Co-Al alloy