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Temperature dependence of the field-cooled magnetization(M) of Nd0.5Sr0.5CoO3 at different magnetic fields(H). Inset: H-dependence of the low temperature maximum (T*).
(a) M-H loops of Nd0.5Sr0.5CoO3 at T = 10, 20, 50, and 100 K. (b) Temperature dependence of the coercive field (Hc) and spontaneous magnetization (Ms).
(a) Magnetization isotherms at selected temperatures. (b) Magnetic entropy change (−ΔSm) as a function of temperature for different applied magnetic fields (H). (c) Field dependence of −ΔSm at TC and at 15 K. (d) Refrigeration capacity (RC) as a function of magnetic field.
(a) Arrot plot (H/M versus M2) of the compound. (b) ΔSm versus M2. (c) Temperature dependence of the spontaneous magnetization Ms(T) and the inverse susceptibility (χ−1) obtained from the Arrot plot (see the text for details). (d) A comparison of Ms(T) values obtained from the Arrot plot (circle) and ΔSm versus M2 graph.
(a) Magnetization as a function of temperature for Nd0.5−xLaxSr0.5CoO3 series (x = 0, 0.2, 0.4, and 0.5). Inset shows the variation of the low temperature maximum at T* and the ferromagnetic Curie temperature as a function of the La content(x). (b) Magnetization isotherms and (c) Magnetic entropy change as a function of temperature for x = 0.2.
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