Fig. 5
The B = 0 x–T phase diagram, B-dependent and x-dependent γ 0, and T = 0 x–B phase diagram of Ce1−x La x B6. a B = 0 x–T phase diagram is shown. It is completed by placing coordinates of specific heat anomalies in the x–T plane. The I–IV transition with transition temperature T I – IV becomes broad above \(x \simeq 0.3\). The region of broad transitions is roughly coincident with the hatched area between the S p = Rln2 isentropic line and the T I – IV(x). b The Sommerfeld coefficient as a function of B with different values of x is presented. Locations of local maxima (see short vertical dashed lines) are coincident with the critical points extrapolated from the lowest-T MCE anomalies. c The black dot and the white circle designate B II – III′ and B III – III′ determined by the MCE analysis, respectively. The high-entropy region exists below B × and the black dash-dotted line connects × symbols as a guide to the eye. The red segment for the low-B III–IV phase boundary is to emphasizes large increase of γ 0 upon entering the phase IV which can be confirmed in b. B II – IV (white dotted-circle), and B I – IV (white star) are also determined by the MCE analysis (see Supplementary Figs. 2 and 3, and Supplementary Note 3). The background is contour plot of γ 0(x, B)
