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Superconductivity in CuAl<sub>2</sub>-type Co<sub>0.2</sub>Ni<sub>0.1</sub>Cu<sub>0.1</sub>Rh<sub>0.3</sub>Ir<sub>0.3</sub>Zr<sub>2</sub> with a high-entropy-alloy transition metal site

Yoshikazu Mizuguchi, Md. Riad Kasem, Tatsuma D. Matsuda

2020Materials Research Letters63 citationsDOIOpen Access PDF

Abstract

Research on high-entropy-alloy (HEA) superconductors is a growing field in material science. In this study, we explored new HEA-type superconductors and discovered a CuAl2-type superconductor Co0.2Ni0.1Cu0.1Rh0.3Ir0.3Zr2 with a HEA-type transition metal site. A superconducting transition was observed at 8.0 K after electrical resistivity, magnetization, and specific heat measurements. The bulk characteristics of the superconductivity were confirmed through the specific heat measurements. The discovery of superconductivity in HEA-type Co0.2Ni0.1Cu0.1Rh0.3Ir0.3Zr2 will provide a novel pathway to explore new HEA-type superconductors and investigate the relationship between the mixing entropy and superconductivity of HEA-type compounds.

Topics & Concepts

SuperconductivityCondensed matter physicsMaterials scienceSuperconducting transition temperatureRoom-temperature superconductorCritical fieldTransition temperatureSpecific heatTransition metalSuperconducting coherence lengthElectrical resistivity and conductivityHigh-temperature superconductivityMetalDopingProximity effect (electron beam lithography)Field (mathematics)Entropy (arrow of time)Type-II superconductorHigh Entropy Alloys StudiesIntermetallics and Advanced Alloy PropertiesHigh Temperature Alloys and Creep
Superconductivity in CuAl<sub>2</sub>-type Co<sub>0.2</sub>Ni<sub>0.1</sub>Cu<sub>0.1</sub>Rh<sub>0.3</sub>Ir<sub>0.3</sub>Zr<sub>2</sub> with a high-entropy-alloy transition metal site | Litcius