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Superconductivity in the η-carbide-type oxides Zr4Rh2Ox


Ma, KeYuan; Lago, Jorge; von Rohr, Fabian O (2019). Superconductivity in the η-carbide-type oxides Zr4Rh2Ox. Journal of Alloys and Compounds, 796:287-292.

Abstract

We report on the synthesis and the superconductivity in (x = 0.4, 0.5, 0.6, 0.7, 1.0). These compounds crystallize in the η-carbide structure, which is a filled version of the complex intermetallic structure. We find that in the system , already a small amount (x 0.4) of oxygen addition stabilizes the η-carbide structure over the more common intermetallic structure-type, in which crystallizes. We show that and are bulk superconductors with critical temperatures of 2.8 K and 4.7 K in the resistivity, respectively. Our analysis of the superconducting properties reveal both compounds to be strongly type-II superconductors with critical fields up to (0) 8.8 mT and (0) 6.08 T. Our results support that the η-carbides are a versatile family of compounds for the investigation of the interplay of interstitial doping on physical properties, especially for superconductivity.

Abstract

We report on the synthesis and the superconductivity in (x = 0.4, 0.5, 0.6, 0.7, 1.0). These compounds crystallize in the η-carbide structure, which is a filled version of the complex intermetallic structure. We find that in the system , already a small amount (x 0.4) of oxygen addition stabilizes the η-carbide structure over the more common intermetallic structure-type, in which crystallizes. We show that and are bulk superconductors with critical temperatures of 2.8 K and 4.7 K in the resistivity, respectively. Our analysis of the superconducting properties reveal both compounds to be strongly type-II superconductors with critical fields up to (0) 8.8 mT and (0) 6.08 T. Our results support that the η-carbides are a versatile family of compounds for the investigation of the interplay of interstitial doping on physical properties, especially for superconductivity.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
07 Faculty of Science > Physics Institute
Dewey Decimal Classification:540 Chemistry
Uncontrolled Keywords:Mechanical Engineering, Materials Chemistry, Mechanics of Materials, Metals and Alloys
Language:English
Date:1 August 2019
Deposited On:14 Feb 2020 09:18
Last Modified:14 Feb 2020 09:18
Publisher:Elsevier
ISSN:0925-8388
OA Status:Closed
Publisher DOI:https://doi.org/10.1016/j.jallcom.2019.04.318
Project Information:
  • : FunderSNSF
  • : Grant IDPZ00P2_174015
  • : Project TitleChemistry and Physics of Nitride Based Materials

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Embargo till: 2020-08-01