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 language | English |
|---|---|
| Article number | 025008 |
| Journal | Superconductor Science and Technology |
| Volume | 32 |
| Issue number | 2 |
| DOIs | |
| State | Published - Feb 2019 |
| Externally published | Yes |
Funding
This work was supported by the Ministry of Science and Higher Education (Poland) under project DI2016 020 546 ('Diamentowy Grant'). Research performed at the AGH-UST was supported by the National Science Center (Poland), project No. 2017/26/E/ST3/00 119. The materials synthesis and powder x-ray diffraction work at Princeton University was supported by the US Department of Energy, Division of Basic Energy Sciences, grant DE-FG02-98ER45706 This work was supported by the Ministry of Science and Higher Education (Poland) under project DI2016 020 546 (‘Diamentowy Grant’). Research performed at the AGH-UST was supported by the National Science Center (Poland), project No. 2017/26/E/ST3/00 119. The materials synthesis and powder x-ray diffraction work at Princeton University was supported by the US Department of Energy, Division of Basic Energy Sciences, grant DE-FG02-98ER45706.
Keywords
- Crystal structure
- Intermetallic compounds
- Superconductivity