Single crystal study of the layered heavy fermion compounds Ce$_2$PdIn$_8$, Ce$_3$PdIn$_{11}$, Ce$_2$PtIn$_8$ and Ce$_3$PtIn$_{11}$

Marie Kratochvilova; Michal Dusek; Klara Uhlirova; Alexandra Rudajevova; Jan Prokleska; Barbora Vondrackova; Jeroen Custers; Vladimir Sechovsky

doi:10.1016/j.jcrysgro.2014.04.008

paper

Single crystal study of the layered heavy fermion compounds Ce $_{2}$ PdIn $_{8}$ , Ce $_{3}$ PdIn $_{11}$ , Ce $_{2}$ PtIn $_{8}$ and Ce $_{3}$ PtIn $_{11}$

arXiv:1403.4363 · doi:10.1016/j.jcrysgro.2014.04.008

Abstract

We report on single crystal growth and crystallographic parameters results of Ce $_{2}$ PdIn $_{8}$ , Ce $_{3}$ PdIn $_{11}$ , Ce $_{2}$ PtIn $_{8}$ and Ce $_{3}$ PtIn $_{11}$ . The Pt-systems Ce $_{2}$ PtIn $_{8}$ and Ce $_{3}$ PtIn $_{11}$ are synthesized for the first time. All these compounds are member of the Ce $_{n}$ T $_{m}$ In $_{3 n + 2 m}$ (n = 1, 2,..; m = 1, 2,.. and T = transition metal) to which the extensively studied heavy fermion superconductor CeCoIn $_{5}$ belongs. Single crystals have been grown by In self-flux method. Differential scanning calorimetry studies were used to derive optimal growth conditions. Evidently, the maximum growth conditions for these materials should not exceed 750 $^{\circ}$ C. Single crystal x-ray data show that Ce $_{2}$ TIn $_{8}$ compounds crystallize in the tetragonal Ho $_{2}$ CoGa $_{8}$ phase (space group P4/mmm) with lattice parameters a =4.6898(3) $A ˚$ and c =12.1490(8) $A ˚$ for the Pt-based one (Pd: a = 4.6881(4) $A ˚$ and c = 12.2031(8) Å). The Ce $_{3}$ TIn $_{11}$ compounds adopt the Ce $_{3}$ PdIn $_{11}$ structure with a = 4.6874(4) $A ˚$ and c = 16.8422(12) $A ˚$ for the Pt-based one (Pd: a = 4.6896 $A ˚$ and c = 16.891 Å). Specific heat experiments on Ce $_{3}$ PtIn $_{11}$ and Ce $_{3}$ PdIn $_{11}$ have revealed that both compounds undergo two successive magnetic transitions at T $_{1}$ ~ 2.2 K followed by T $_{N}$ ~ 2.0 K and T $_{1}$ ~ 1.7 K and T $_{N}$ ~ 1.5 K, respectively. Additionally, both compounds exhibit enhanced Sommerfeld coefficients yielding γ $_{P t}$ = 0.300 J/mol K $^{2}$ Ce (γ $_{P d}$ = 0.290 J/mol K $^{2}$ Ce), hence qualifying them as heavy fermion materials.

Single crystal study of the layered heavy fermion compounds Ce $_{2}$ PdIn $_{8}$ , Ce $_{3}$ PdIn $_{11}$ , Ce $_{2}$ PtIn $_{8}$ and Ce $_{3}$ PtIn $_{11}$

Abstract

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Single crystal study of the layered heavy fermion compounds Ce2​PdIn8​, Ce3​PdIn11​, Ce2​PtIn8​ and Ce3​PtIn11​

Abstract

References in corpus (12)

Cited by in corpus (15)

Single crystal study of the layered heavy fermion compounds Ce $_{2}$ PdIn $_{8}$ , Ce $_{3}$ PdIn $_{11}$ , Ce $_{2}$ PtIn $_{8}$ and Ce $_{3}$ PtIn $_{11}$