THERMODYNAMIC, ELECTRONIC AND MAGNETIC-PROPERTIES OF INTERMETALLIC COMPOUNDS THROUGH STATISTICAL-MODELS

Local and average electronic and magnetic properties of transition met al alloys are strongly correlated to the distribution of atoms on the lattice sites. The ability of some systems to form long range ordered structures at low temperature allows to discuss their properties in te rm of well identified occupation operators as those related to long ra nge order (LRO) parameters. We show that using theoretical determinati ons of these LRO parameters through statistical models like the cluste r variation method (CVM) developed to simulate the experimental phase diagrams, we are able to reproduce a lot of physical properties. In th is paper we focus on two points: (i) a comparison between CVM results and an experimental determination of the LRO parameter by NMR at Co-59 in a CoPt3 compound, and (ii) the modelling of the resistivity of fer romagnetic and paramagnetic intermetallic compounds belonging to Co-Pt , Ni-Pt and Fe-Al systems. All experiments were performed on samples i n identified thermodynamic states, implying that kinetic effects are t horoughly taken into account.