We develop and apply high pressure techniques to study the modification of electronic structure, magnetic properties, and local crystal structure, in magnetic materials under high pressure. The variation in inter-atomic distances and atomic volumes in the high pressure regime provides new information for elucidating electronic processes in solids, and for understanding the connection between electronic structure and magnetic properties of matter.
For our samples we used rare-earth orthoferrites, which are of the perovskite-type structure, and Heusler alloys, with the cubic structure. Those materials are known to be magnetic insulators and magnetic metals, respectively.
We studied the following properties induced by high pressure: electronic structure, spin crossover effects, magnetic to non-magnetic transitions, and insulator-to-metal transitions. The problems of delocalization, distribution of spin, and charge density distribution in dielectric materials, semiconductors, and metals, as well as chemical bonding can be investigated in this way.