Effect of Pressure on the Interplay Between Orbital and Magnetic Ordering, Kondo Effect, Valence Fluctuations, and Superconductivity in Rare-Earth Compounds

Abstract

Abstract In this chapter, we present many experimental results dealing with electronic properties such as magnetic ordering or superconductivity observed at high pressure in rare-earth containing compounds. We emphasize that the effect of pressure on the interplay between several interactions among conduction electrons in the rare-earth compounds gives rise to anomalous behavior of the characteristic temperatures. Section 2 is dealing with pressure-induced anomalous electronic and magnetic phenomena in nonmagnetic Kondo 1-2-20 Yb and Pr compounds, while Section 3 describes in details characteristic properties of Fe-based superconductors for materials such as (1111) and spin-ladder compounds. The valence fluctuation phenomena under high pressure are briefly reviewed in Section 4 and different effect of the influence of pressure on the electronic properties are found for the Yb and Ce compounds. The effects of magnetic field and pressure on the superconducting and magnetic properties are described for borocarbides showing the importance of the interplay between superconductivity and magnetism at high pressure.