Field-tuned critical fluctuations in YFe2Al10: Evidence from magnetization, Al-27 NMR, and NQR investigations

Article

关键词: FERMI-LIQUID BEHAVIOR;    SPIN-LATTICE RELAXATION;    PHASE;    SYSTEM;    UCU5-XPDX;    RESONANCE;    METALS;    STATE;   

DOI  :  10.1103/PhysRevB.86.220401

来源: SCIE

【 摘 要 】

We report magnetization, specific heat, and NMR investigations on YFe2Al10 over a wide range of temperature and magnetic field and zero field (NQR) measurements. Magnetic susceptibility, specific heat, and spin-lattice relaxation rate divided by T (1/T1T) follow a weak power law (similar to T-0.4) temperature dependence, which is a signature of the critical fluctuations of Fe moments. The value of the Sommerfeld-Wilson ratio and the linear relation between 1/T1T and. suggest the existence of ferromagnetic correlations in this system. No magnetic ordering down to 50 mK in C-p(T)/T and the unusual T and H scaling of the bulk and NMR data are associated with a magnetic instability which drives the system to quantum criticality. The magnetic properties of the system are tuned by field wherein ferromagnetic fluctuations are suppressed and a crossover from quantum critical to Fermi-liquid behavior is observed with increasing magnetic field.

【 授权许可】

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