(a) Temperature dependence of magnetization. The inset shows dM/dT versus T used for the determination of TC . (b) Temperature dependence of the isothermal magnetic entropy change −ΔSM (T, H) for Mn0.96Nb0.04CoGe calculated from magnetization isotherms. (c) Dependence of the magnetic entropy change on the parameter (H/TC )2/3. The solid line represents a linear fit to the data.
(a) Isothermal magnetization curves for Mn0.96Nb0.04CoGe in the vicinity of TC . (b) Arrott plot of M 2 vs H/M at temperatures in the vicinity of TC . (c) Temperature dependence of the spontaneous magnetization MS and inverse initial susceptibility χ 0 − 1 (solid lines are fitted to Eqs. (1) and (2) . (d) Modified Arrott plot obtained by the Kouvel–Fisher method showing isotherms of vs with the calculated and .
(a) Kouvel-Fisher plot for the spontaneous magnetization and the inverse initial susceptibility (T) (solid lines are fitted to Eqs. (3) and (4) ). (b) The critical isotherm analysis at TC . The inset shows the same plots on the log–log scale (solid line is a linear fit to Eq. (5) . (c) Scaling plots indicating universal curves below and above TC for the Mn0.96Nd0.04CoGe alloy.
(a) Isothermal −ΔSM vs. M 2 curves for Mn0.96Nb0.04CoGe. Solid lines are linear fits to data. (b) Spontaneous magnetization of Mn0.96Nb0.04CoGe, estimated from the extrapolation of the (−ΔSM vs. M 2) curves and from the Arrott plots (H/M vs. M 2).
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