Determination of phase diagrams involving magnetic transitions

This chapter describes various ways to determine phase diagrams involving magnetic transitions. The chapter begins with an introduction to measurements of magnetic properties, then, uses examples to illustrate the interaction of ordering and magnetism. Further, the chapter introduces the combinatorial/high-throughput approach that is becoming an important tool for accelerated experimentation for materials science. This new approach can greatly accelerate phase diagram studies, especially for understanding highly correlated systems involving complex interplay among magnetism, ordering, and electronic transitions. These complex systems are becoming increasingly important in technological applications. To perform complete determination of a phase diagram with magnetic transitions requires a number of tasks in materials synthesis as well as characterization. It is important to keep in mind that there are systems where optimum materials processing conditions vary drastically within one phase diagram. In such instances, mapping the entire phase diagram on a single chip is not appropriate. One solution to this is to divide up the diagram into several composition-spread chips to be processed under different conditions.