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

doi:10.1088/1361-6668/aaf48f

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

Research output: Contribution to journal › Article › peer-review

15 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 language	English (US)
Article number	025008
Journal	Superconductor Science and Technology
Volume	32
Issue number	2
DOIs	https://doi.org/10.1088/1361-6668/aaf48f
State	Published - 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

Access to Document

10.1088/1361-6668/aaf48f

Cite this

@article{ed383783eac74c429cc6c1a0b06a4423,

title = "CeIr 3: Superconductivity in a phase based on tetragonally close packed clusters",

abstract = " We present the crystallographic analysis, superconducting and spectroscopic characterization, and theoretical modeling of CeIr 3 . Lattice parameters a = 5.2945(1) {\AA} and c = 26.219(1) {\AA} 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.",

keywords = "Crystal structure, Intermetallic compounds, Superconductivity",

author = "Karolina G{\'o}rnicka and Carnicom, {Elizabeth M.} and Sylwia Go{\l}ab and Marcin {\L}api{\'n}ski and Bart{\l}omiej Wiendlocha and Weiwei Xie and Dariusz Kaczorowski and Cava, {Robert J.} and Tomasz Klimczuk",

note = "Publisher Copyright: {\textcopyright} 2019 IOP Publishing Ltd.",

year = "2019",

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doi = "10.1088/1361-6668/aaf48f",

language = "English (US)",

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journal = "Superconductor Science and Technology",

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TY - JOUR

T1 - CeIr 3

T2 - Superconductivity in a phase based on tetragonally close packed clusters

AU - Górnicka, Karolina

AU - Carnicom, Elizabeth M.

AU - Gołab, Sylwia

AU - Łapiński, Marcin

AU - Wiendlocha, Bartłomiej

AU - Xie, Weiwei

AU - Kaczorowski, Dariusz

AU - Cava, Robert J.

AU - Klimczuk, Tomasz

PY - 2019/2

Y1 - 2019/2

N2 - 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.

AB - 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.

KW - Crystal structure

KW - Intermetallic compounds

KW - Superconductivity

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