As-75 nuclear magnetic resonance study of antiferromagnetic fluctuations in the normal state of LiFeAs

P. Jeglic, A. Potocnik, M. Klanjsek, M. Bobnar, M. Jagodic, K. Koch, H. Rosner, S. Margadonna, B. Lv, A. M. Guloy, D. Arcon

Research output: Contribution to journalArticlepeer-review

Abstract

We present a detailed study of As-75 nuclear magnetic resonance Knight shift and spin-lattice relaxation rate in the normal state of stoichiometric polycrystalline LiFeAs. Our analysis of the Korringa relation suggests that LiFeAs exhibits strong antiferromagnetic fluctuations, if transferred hyperfine coupling is a dominant interaction between As-75 nuclei and Fe electronic spins, whereas for an on-site hyperfine coupling scenario, these are weaker, but still present to account for our experimental observations. Density-functional calculations of electric field gradient correctly reproduce the experimental values for both As-75 and Li-7 sites.

Original languageEnglish
Article number140511
Pages (from-to)-
Number of pages4
JournalPhysical review B
Volume81
Issue number14
DOIs
Publication statusPublished - 1 Apr 2010

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