Abstract
High-entropy alloys are characteristic of extensive atomic occupational disorder on high-symmetric lat-tices,differing from traditional alloys.Here,we investigate the magnetic and thermal transport proper-ties of the prototype face-centered-cubic high-entropy alloy CrMnFeCoNi by combining physical proper-ties measurements and neutron scattering.Direct-current and alternating-current magnetizations mea-surements indicate a mictomagnetic behavior with coexisting antiferromagnetic and ferromagnetic in-teractions below room temperature and three anomalies are found at about 80,40,and 20 K,which are related to the paramagnetic to antiferromagnetic transition,the antiferromagnetic to ferromagnetic transition,and the spin freezing,respectively.The electrical and thermal conductivities are significantly reduced compared to Ni,and the temperature dependence of lattice thermal conductivity exhibits a glass-like plateau.Inelastic neutron scattering measurements suggest weak anharmonicity so that the thermal transport is expected to be dominated by the defect scattering.
基金项目
Liaoning Revital-ization Talents Program(XLYC1807122)
National Natu-ral Science Foundation of China(11804346)
National Natu-ral Science Foundation of China(12005243)
National Natu-ral Science Foundation of China(51771197)
Key Research Program of Frontier Sciences of Chi-nese Academy of Sciences(ZDBS-LY-JSC002)
Ministry of Science and Technology of China(2020YFA0406002)
beam time provided by J-PARC through proposal(2018A0176)
NETL
NSTL
维普
万方数据