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(a) Isothermal magnetization curves at 266 K. (b) Temperature-dependent entropy change under different magnetic fields for NCMS alloys in the initial state. (c) Comparison of the ΔS-T curves under a magnetic field change of 0–3 T for the cases in the initial state, compressive strain state, and releasing strain state, where the cooling temperature span is marked by the shadow area. The inset shows the comparison of the magnetic-field-dependent entropy change for the above three cases.
