Pressure effects on the heavy-fermion antiferromagnet CeAuSb2

Article

关键词: ELECTRICAL-RESISTIVITY;    KONDO SYSTEMS;    SUPERCONDUCTIVITY;    TRANSPORT;    MAGNETISM;    BEHAVIOR;    LATTICE;    METALS;    FIELD;    T=NI;   

DOI  :  10.1103/PhysRevB.85.205145

来源: SCIE

【 摘 要 】

The f-electron compound CeAuSb2, which crystallizes in the ZrCuSi2-type tetragonal structure, orders antiferromagnetically between 5 and 6.8 K, where the antiferromagnetic transition temperature T-N depends on the occupancy of the Au site. Here we report the electrical resistivity and heat capacity of a high-quality crystal CeAuSb2 with T-N of 6.8 K, the highest for this compound. The magnetic transition temperature is initially suppressed with pressure, but is intercepted by a new magnetic state above 2.1 GPa. The new phase shows a dome shape with pressure and coexists with another phase at pressures higher than 4.7 GPa. The electrical resistivity shows a T-2 Fermi-liquid behavior in the complex magnetic state, and the residual resistivity and the T-2 resistivity coefficient increases with pressure, suggesting the possibility of a magnetic quantum critical point at a higher pressure.

【 授权许可】

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