Magnetic and Electrical Transport Properties of Tm_xR_1−xB₆ (R = Ca and Yb) Produced by Using High-Pressure Synthesis

Abstract

Production of single phase of TmB 6 , which is expected to show valence fluctuation with valence = 2.6 by previous study of Tm x R 1-x B 6 , has not been reported to date. We have succeeded in synthesis of Tm x Ca 1-x B 6 up to x = 0.2 by high-pressure synthesis. The x dependence of lattice parameters in Tm 1-x Ca x B 6 suggests that Tm-valence shows trivalent up to x = 0.2. From the transport and magnetic properties of this alloy, we discuss the possibility that they show non-Fermi liquid behavior.