Ferromagnetic ordering of minority Ce3+ spins in a quasi-skutterudite Ce3Os4Ge13 single crystal

Article

关键词: HEAVY-FERMION SUPERCONDUCTIVITY;    4F-LIGAND HYBRIDIZATION;    LIQUID BEHAVIOR;    COEXISTENCE;    CERIUM;    MAGNETORESISTANCE;    RESISTIVITY;    TRANSPORT;    PRESSURE;    CE2SN5;   

DOI  :  10.1103/PhysRevB.93.064427

来源: SCIE

【 摘 要 】

We report site disorder driven ferromagnetic ordering of nearly 8% Ce atoms in single crystalline Ce3Os4Ge13 below 0.5 K. Ce3Os4Ge13 crystallizes in a cubic structure with space group Pm (3) over barn. The structural analysis shows the presence of site disorder in the system, where the 2(a) Ge site is partially occupied by the Ce atoms. Due to the small Ce 4 integral-ligand hybridization, these Ce atoms are in the Ce3+ (magnetic) state while the rest of the Ce atoms in the unit cell are in the Ce4-delta (nonmagnetic) state. The heat capacity shows a peak below 0.5 K corresponding to the ferromagnetic ordering of the Ce3+ moments. The ferromagnetic ordering below 0.5 K is also seen in the ac-susceptibility data. At low temperatures (1.8 K <= T <= 6 K), the magnetization shows ln(T) dependence, whereas the resistivity shows power-law (T-n) temperature dependence indicating the non-Fermi-liquid behavior of the quasiparticles.

【 授权许可】

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