Spin fluctuations in Al3V: An NMR study

Article

关键词: HEAVY-FERMION;    METALS;    TRIALUMINIDE;    RESISTIVITY;    RELAXATION;    SYSTEMS;    LIV2O4;   

DOI  :  10.1103/PhysRevB.60.8533

来源: SCIE

【 摘 要 】

We report the results of a nuclear magnetic resonance (NMR) study of Al3V at temperatures between 4 and 300 K. V-51 and Al-27 Knight shifts exhibit a Curie-Weiss behavior corresponding to an effective moment P(eff)similar or equal to 0.32E mu(B) per V, indicating intrinsic weak magnetism localized in vanadium orbitals. The T-1 exhibits root T dependence at higher temperatures, indicative of nearly antiferromagnetic behavior of itinerant electrons. We have fit the observed behavior within the self-consistent renormalized model for itinerant magnetism, which provides good agreement with the measurements. At about 80 K, the Knight shifts and spin-lattice relaxation rates exhibit a crossover from Curie-Weiss magnetism to Korringa behavior. Comparing previously reported specific heat and transport results with our NMR results, we find that the Wilson ratio and Kadowaki-Woods relation are close to those observed for highly correlated electron compounds, despite the relatively small enhancement of gamma and chi. [S0163-1829(99)16835-8].

【 授权许可】

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