Figure 1

Temperature dependence of the real part of ac magnetic susceptibility ${\chi }^{\prime }(T)$ for ${\mathrm{CeRhIn}}_5$ (sample A) at selected pressures. Although the demagnetization effect is not corrected, it is understood that a $P$-independent saturation value of $-4\pi {\chi }^{\prime }(T)$ below $T_c$ corresponds to the full shielding effect, because the superconductivity above $P_c$ ($\sim 18.5\mathrm{kbar}$) is established to be of the bulk origin.Reuse & Permissions

Figure 2

(a) Temperature-pressure phase diagram of ${\mathrm{CeRhIn}}_5$. Filled symbols are obtained from the present measurements for sample A (circles and triangles; triangles denoting the first SC transition in the intermediate $P$ region), sample B (inverted triangles), and sample C (diamonds and squares). The solid line represents the superconducting transition temperatures calculated from the relation $T_c{}^{n}T_N{}^{1-n}=T_{c0}$; the broken line represents the speculated AF ordering temperatures (see text). An open triangle is deduced from dHvA experiments [10]. Open circles and crosses are taken from ac calorimetry measurements by Knebel et al. [13], and Park et al. [14], respectively. (b) Temperature dependence of the imaginary part of ac magnetic susceptibility ${\chi }^{\prime \prime }(T)$ at 14 kbar. The arrow indicates the AF transition temperature $T_N$. (c) Pressure dependence of the ratio $n$ deduced from the specific heat measurements of Ref. 17. The broken line indicates an extrapolation, corresponding to that of the $\gamma$ coefficient estimated by Fisher et al. (see Fig. 6 in Ref. 17). Here we assumed that $n$ does not change drastically at $P_c$ and ${\gamma }_n=420\mathrm{mJ}/\mathrm{mol}{\mathrm{K}}^2$ [6] at all pressures.Reuse & Permissions

Figure 3

(a) Temperature dependence of the ac magnetic susceptibility of ${\mathrm{CeRhIn}}_5$ (sample A) at ambient pressure in the form of the bulk single crystal (circles), the powdered single crystal (diamonds), and the annealed powdered crystal (squares). Open (filled) symbols represent the imaginary (real) part. (b) Temperature dependence of the ac magnetic susceptibility of ${\mathrm{CeRhIn}}_5$ (sample D) at ambient pressure for the polished sample (circles) and the annealed polished sample (diamonds). Open (filled) symbols represent the imaginary (real) part.Reuse & Permissions