CeIr3Ge7: A local moment antiferromagnetic metal with extremely low ordering temperature

Article

关键词: QUANTUM CRITICAL-POINT;    MAGNETIC-PROPERTIES;    CRYSTAL-STRUCTURE;    SINGLE-CRYSTAL;    PHYSICAL-PROPERTIES;    PHASE-TRANSITIONS;    KONDO-LATTICE;    COMPOUND;    SUPERCONDUCTIVITY;    SUSCEPTIBILITY;   

DOI  :  10.1103/PhysRevB.98.195119

来源: SCIE

【 摘 要 】

CeIr3Ge7 is an antiferromagnetic metal with a remarkably low ordering temperature T-N = 0.63 K, while most Ce-based magnets order between 2 and 15 K. Thermodynamic and transport properties as a function of magnetic field or pressure do not show signatures of Kondo correlations, interaction competition, or frustration, as had been observed in a few antiferromagnets with comparably low or lower T-N. The averaged Weiss temperature measured below 10 K is comparable to T-N, suggesting that the Ruderman-Kittel-Kasuya-Yosida exchange coupling is very weak in this material. The unusually low T-N in CeIr3Ge7 can therefore be attributed to the large Ce-Ce bond length of about 5.7 , which is about 1.5 larger than in the most Ce-based intermetallic systems.

【 授权许可】

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