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Magnetization vs temperature plots for annealed and as cast samples of in an applied field of . While plot for the as cast sample was obtained using a SQUID magnetometer, a VSM was used in the case of the annealed sample. The ZFC curve actually overlaps with FCW curve, and is not shown here separately for the sake of clarity.
Isothermal magnetization vs field plots at in , measured under three different experimental protocols P1, P2, and P3. See text for details.
Change in entropy as a function of temperature across the austenite-martensite transition in , measured under three different experimental protocols P1, P2, and P3.
Estimation of refrigerant capacity using the method of Gschneidner et al. (Ref. 11). Crossed area measures the refrigerant capacity of the material. The maximum applied field is .
Useful temperature range, refrigerant capacity, average hysteresis loss, and effective refrigerant capacity estimated for measured under the three different protocols using method described in Refs. 11 and 12.
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