Emergent properties in the natural composite Ni 2 MnSb 0.5

Unlike many oxide composites, the magnetic properties of the Ni2MnSb0.5Al0.5 cannot be considered as the volume average of the characteristics of the two phases, rather it shows a long range ferromagnetic order with Curie temperature of 334 K and magnetic moment of 2.52 µB/f.u. [...] The up-spins of the composites Co2Mn1− xTixSn (0 ≤ x ≤ 1), the Mn–rich phase AFM Al–rich phase pins with the up-spins of Sb–rich phase, and Ti–rich phase show two magnetic phase transitions which thus hindering the establishment of long range order in either can be correlated with the different Curie temperatures of the of the phases. [...] magnetic field was observed in the vicinity of the Curie tem- indicates that the ferromagnetic pinning between the FM and perature, as can be seen in the inset of figure 5. [...] This fact points towards the presence of the lattice thermal conductivity has been calculated by sub- the individual band structures or in other words, the separate tracting the electronic contribution from the total thermal electronic phases in the composite. [...] To by recording the temperature dependence of the heat capacity elucidate the origin of this feature, we proceed to explore the (CP(T)) of the composite.