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Ferromagntic Fe2MnSi0.5Al0.5 Heusler alloy has been studied here by analyzing its magnetic properties. To obtain the higher para to ferro magnetic transition temperature i.e. Curie temperature from the existing value of the parent compound, this particular compound has been chosen and, its critical exponent analysis has been done as there is no unique model for the 3d transition magnetic alloys to define their nature of phase transition. It has been observed that the material exhibit its Curie temperature at 225K and the Arrott plot technique employed here for obtaining Curie temperature also suggests that the magnetic phase transition observed here is of 2nd order. The critical exponent values i. e. β = 0.49, γ = 1.001 and δ = 3.04 are closely matching with theoretical Mean field value which indicates the existence of long range ferromagnetic ordering in the sample.

Substitution of monovalent Na+ at La3+ in La1-xNaxMnO3 (LNMO) manganites, synthesized using solid state reaction route, results in ferromagnetic (FM) behavior. Increase in monovalent Na-content in the system leads to reduction in magnetic transition temperature and magnetic moment which has been discussed in the light of structural changes taking place due to the substitution and the structure-property correlations.

The effect of Ag substitution on structural and magnetic transition in GdCu has been studied by electrical resistivity and heat capacity measurements. With Ag substitution magnetic transition temperature (TN2) remain nearly constant whereas the structural transition temperature (TS) decrease down to ∼160 K for x = 0–0.06 in GdCu1−xAgx. However the structural transition is absent for x = 0.08 and 0.10 contrary to expectation from linear variation of TS in the range x = 0–0.06. These studies suggest that magnetic ordering of cubic phase hinders the structural transition resulting in co‐existing orthorhombic and cubic phase at low temperature.

We present clear evidence for ferromagnetic ordering in the magnetization data of (BEDT‐TTFVS)⋅FeBr4, which was newly synthesized as a semiconducting 1:1 charge‐transfer salt. Magnetization data obtained by a resonant circuit method show a magnetic transition temperature of 1.9 ± 0.3 K, and a hysteresis loop below 1.5 K. An additional magnetization jump at 0.2 T was clearly observed below 1.9 K, suggesting that the salt does not show simple ferromagnetism but a more complicated behavior such as a canted ferromagnetism.

The variations of the superconducting transition temperature, Tc, and magnetic transition temperature, TN, as a function of Gd concentration, x, were investigated in Tm1−xGdxNi2B2C system. TmNi2B2C has a superconducting transition at Tc=11 K and magnetic transition at TN=1.5 K. While GdNi2B2C has two magnetic transitions at TN=19 K and TN′=13 K. In 0

In this paper, we have examined the pressure effect on the magnetic transitions of Mn2.97Co0.03GaC and Mn2.7Co0.3GaC by measuring the electrical resistivity. The Curie temperature Tc increased linearly with increasing pressure for both samples. For Mn2.97Co0.03GaC, magnetic transition temperature Ttl from the antiferromagnetic state to the intermediate one, which also appears by substituting Co for Mn, decrease rapidly with pressure.