The electronic characterization of the cubic Laves-phase superconductor CaRh2

Karolina Górnicka, Robert J. Cava, Tomasz Klimczuk

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

We present the synthesis and experimental characterization of the electronic properties of the cubic Laves phase superconductor CaRh2. Its crystal structure was confirmed by powder X-ray diffraction and its ambient temperature lattice parameter (a = 7.5326(6) Å) is in good agreement with the literature. Magnetization, resistivity and heat-capacity measurements indicate that CaRh2 is a moderate-coupling type-II superconductor (λe-p = 0.89) with a transition temperature Tc = 5.13 K. A sharp discontinuity at Tc in the heat capacity shows that the normalized specific-heat jump is ΔC/γTc = 1.78, which exceeds the value predicted by weak-coupling BCS theory (1.43).

Original languageEnglish (US)
Pages (from-to)393-399
Number of pages7
JournalJournal of Alloys and Compounds
Volume793
DOIs
StatePublished - Jul 15 2019

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Keywords

  • Experimental characterization
  • Laves phase
  • Superconductivity
  • Synthesis

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