Transport and thermodynamic properties of (Ca${}_{1\ensuremath{-}x}$La${}_{x}$)${}_{10}$(Pt${}_{3}$As${}_{8}$)(Fe${}_{2}$As${}_{2}$)${}_{5}$ superconductors

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Transport and thermodynamic properties of (Ca $_{1 - x}$ La $_{x}$ ) $_{10}$ (Pt $_{3}$ As $_{8}$ )(Fe $_{2}$ As $_{2}$ ) $_{5}$ superconductors

N. Ni, W. E. Straszheim, D. J. Williams, M. A. Tanatar, R. Prozorov, E. D. Bauer, F. Ronning, J. D. Thompson, and R. J. Cava

Phys. Rev. B 87, 060507(R) – Published 22 February 2013

Abstract

Single crystals of (Ca $_{1 - x}$ La $_{x}$ ) $_{10}$ (Pt $_{3}$ As $_{8}$ )(Fe $_{2}$ As $_{2}$ ) $_{5}$ ( $x = 0$ –0.182) superconductors have been grown and characterized by x-ray, microprobe, transport, and thermodynamic measurements. Features in the magnetic susceptibility, specific heat, and two kinks in the derivative of the electrical resistivity around 100 K in the $x = 0$ compound support the existence of decoupled structural and magnetic phase transitions. With La doping, the structural/magnetic phase transitions are suppressed and a half dome of superconductivity with a maximal $T_{c}$ around 26 K is observed in the temperature-concentration phase diagram.

Received 17 December 2012

DOI:https://doi.org/10.1103/PhysRevB.87.060507

Authors & Affiliations

N. Ni^1,2,3,4, W. E. Straszheim⁵, D. J. Williams¹, M. A. Tanatar⁵, R. Prozorov⁵, E. D. Bauer¹, F. Ronning¹, J. D. Thompson¹, and R. J. Cava²

¹Los Alamos National Laboratory, Los Alamos, New Mexico 87544, USA
²Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA
³Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
⁴California Nanosystems Institute, University of California, Los Angeles, California 90095, USA
⁵Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA

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Vol. 87, Iss. 6 — 1 February 2013

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Physical Review B

covering condensed matter and materials physics

Transport and thermodynamic properties of (Ca $_{1 - x}$ La $_{x}$ ) $_{10}$ (Pt $_{3}$ As $_{8}$ )(Fe $_{2}$ As $_{2}$ ) $_{5}$ superconductors

N. Ni, W. E. Straszheim, D. J. Williams, M. A. Tanatar, R. Prozorov, E. D. Bauer, F. Ronning, J. D. Thompson, and R. J. Cava

Phys. Rev. B 87, 060507(R) – Published 22 February 2013

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Physical Review B

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Transport and thermodynamic properties of (Ca1−xLax)10(Pt3As8)(Fe2As2)5 superconductors

N. Ni, W. E. Straszheim, D. J. Williams, M. A. Tanatar, R. Prozorov, E. D. Bauer, F. Ronning, J. D. Thompson, and R. J. Cava

Phys. Rev. B 87, 060507(R) – Published 22 February 2013

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Transport and thermodynamic properties of (Ca $_{1 - x}$ La $_{x}$ ) $_{10}$ (Pt $_{3}$ As $_{8}$ )(Fe $_{2}$ As $_{2}$ ) $_{5}$ superconductors