Magnetic, Thermal, and Transport Properties of Layered Arsenides BaRu2As2 and SrRu2As2

Abstract

The magnetic, thermal and transport properties of polycrystalline BaRu2As2 and SrRu2As2 samples with the ThCr2Si2 structure were investigated by means of magnetic susceptibility chi(T), electrical resistivity rho(T), and heat capacity Cp(T) measurements. The temperature (T) dependence of rho indicates metallic character for both compounds with residual resistivity ratios rho(310 K)/rho(2 K) of 17 and 5 for the Ba and Sr compounds, respectively. The Cp(T) results reveal a low-T Sommerfeld coefficient gamma = 4.9(1) and 4.1(1) mJ/mol K^2 and Debye temperature Θ_D = 271(7) K and 271(4) K for the Ba and Sr compounds, respectively. The chi (T) was found to be diamagnetic with a small absolute value for both compounds. No transitions were found for BaRu2As2 above 1.8 K. The chi(T) data for SrRu2As2 exhibit a cusp at \sim 200 K, possibly an indication of a structural and/or magnetic transition. We discuss the properties of BaRu2As2 and SrRu2As2 in the context of other ThCr2Si2-type and ZrCuSiAs-type transition metal pnictides.

6 pages, 6 figures; v2: additional discussion of the relationship with FeAs-type materials and the importance of Stoner enhancement of the susceptibility

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Cited by in corpus (18)

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• Superconductivity in Ru substituted BaFe2-xRuxAs2
• Symmetry preserving lattice collapse in tetragonal SrFe_(2-x)Ru_xAs_2 (x = 0, 0.2) -- a combined experimental and theoretical study
• New Ternary Superconducting Compound LaRu2As2: Physical Properties from DFT Calculations
• Evolution of transport properties of BaFe2-xRuxAs2 in a wide range of isovalent Ru substitution
• Synthesis, Structure and Properties of Tetragonal Sr2M3As2O2 (M3 = Mn3, Mn2Cu and MnZn2) Compounds Containing Alternating CuO2-Type and FeAs-Type Layers
• Electronic band structure, Fermi surface, and elastic properties of new 4.2K superconductor SrPtAs from first-principles calculations
• Effects of disordered Ru substitution in BaFe${}_2$As${}_2$: Realization of superdiffusion mechanism in real materials
• Superconductivity at 7.8 K in the ternary LaRu2As2 compound
• Bose-Einstein condensation of triplons close to the quantum critical point in the quasi-one-dimensional spin-$1/2$ antiferromagnet NaVOPO${}_4$
• Structural and physical properties of layered oxy-arsenides LnRuAsO (Ln = La, Nd, Sm, Gd)
• Ru-doping on iron based pnictides: the "unfolded" dominant role of structural effects for superconductivity
• NMR evidence for an intimate relationship between antiferromagnetic spin fluctuations and extended s-wave superconductivity in mono-crystalline SrFe2(As_{1-x}P_{x})2
• High-$T_c$ Iron-phosphide Superconductivity Enhanced by Reemergent Antiferromagnetic Spin Fluctuations in (Sr${}_4$Sc${}_2$O${}_6$)Fe${}_2$(As${}_{1-x}$P${}_x$)${}_2$ probed by NMR
• Structural and magnetic properties of spin-$1/2$ dimer compound Cu${}_2$(IPA)${}_2$(DMF)(H${}_2$O) with a large spin gap
• Type II superconductivity in SrPd2Ge2
• 75As NMR probe of antiferromagnetic fluctuations in Ba(Fe1-xRux)2As2
• Experimental and theoretical electronic structure of EuRh2As2