Temperature and field dependence of the magnetization in crystalline and amorphous metallic alloys

Effect of Fe substitution on magnetocaloric effect in La0.7Sr0.3Mn1−xFexO3 (0.05≤x≤0.20)

“…The T C estimated from the MÀ T curves and the Arrott plots are in close to each other, e.g., the MÀT curve of x¼0.07 sample yields T C ¼296 K and the Arrott plots also give almost the same value of T C , between 295 and 300 K. While compositions from x¼0.05 to x¼0.15 exhibit a similar behavior, the x¼0.20 sample shows a small spontaneous magnetization (M 2 intercept). The Arrott plot of x¼0.20 sample resembles that of clusterglass samples which have short-range ferromagnetic interactions as seen in (Fe 0.7 Mn 0.3 ) 0.75 P 15 C 10 amorphous alloys [25]. The cluster-glass Table 1 The determined T C, paramagnetic Curie temperature (y p ), paramagnetic effective magnetic moment (P eff ), and saturation magnetization (M S ) values of La 0.7 Sr 0.3 Mn 1 À x Fe x O 3 system.…”

Anisotropic and Inhomogeneous Magnetic Interactions Observed in All-Organic Nitroxide Radical Liquid Crystals

“…The Brillouin function curve analysis to determine the net spin state in the PLC phases was infeasible due to the variable χ dia and no magnetization saturation below 5 T in the LC state at high temperatures. Therefore, to evaluate the NPM behavior in a weak magnetic field, we plotted M 2 as a function of H / M (Arrott−Belov−Kouvel plots) for respective crystalline and PLC phases of all compounds. In these crystalline phases, the M 2 − H / M plots showed straight lines almost parallel to the M 2 axis (Figure e), indicating that the H / M which is equal to reciprocal molar magnetic susceptibility (1/χ M ) is constant and thereby that the χ M in the crystalline phases is independent of H .…”

Microstructure and Soft Magnetic Properties of Fe-Zr-(Pt)-Nb-Cu-B Amorphous Alloys

“…In order to distinguish the order of the phase transition, the so-called Arrott's curves have been constructed, based on the equation: σ 2 (μ 0 H/σ) [17,18]. As can be seen in Fig.…”