CeIr 3: Superconductivity in a phase based on tetragonally close packed clusters

Karolina Górnicka, Elizabeth M. Carnicom, Sylwia Gołab, Marcin Łapiński, Bartłomiej Wiendlocha, Weiwei Xie, Dariusz Kaczorowski, Robert J. Cava, Tomasz Klimczuk

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4 Scopus citations

Abstract

We present the crystallographic analysis, superconducting and spectroscopic characterization, and theoretical modeling of CeIr 3 . Lattice parameters a = 5.2945(1) Å and c = 26.219(1) Å are found for the R-3m symmetry crystal structure, which are close to the literature values. CeIr 3 is a moderate type-II superconductor (κ GL = 17, λ e-p = 0.65) below 2.5 K. Ce ions exhibit a strongly intermediate valence character as evidenced by x-ray photoelectron spectroscopy. The normal state magnetic susceptibility is weakly temperature dependent and follows the inter-configuration fluctuation model with a singlet Ce-4 f 0 ground state. Theoretical calculations support a non-magnetic ground state of the system and reveal that Ir-5d states are dominant at the Fermi level.

Original languageEnglish (US)
Article number025008
JournalSuperconductor Science and Technology
Volume32
Issue number2
DOIs
StatePublished - Feb 2019

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

Keywords

  • Crystal structure
  • Intermetallic compounds
  • Superconductivity

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    Górnicka, K., Carnicom, E. M., Gołab, S., Łapiński, M., Wiendlocha, B., Xie, W., Kaczorowski, D., Cava, R. J., & Klimczuk, T. (2019). CeIr 3: Superconductivity in a phase based on tetragonally close packed clusters. Superconductor Science and Technology, 32(2), [025008]. https://doi.org/10.1088/1361-6668/aaf48f