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

doi:10.1103/PhysRevB.81.140511

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

School of Chemistry

Research output: Contribution to journal › Article › peer-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 language	English
Article number	140511
Pages (from-to)	-
Number of pages	4
Journal	Physical review B
Volume	81
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.81.140511
Publication status	Published - 1 Apr 2010

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http://prb.aps.org/abstract/PRB/v81/i14/e140511

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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.",

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AU - Jeglic, P.

AU - Potocnik, A.

AU - Klanjsek, M.

AU - Bobnar, M.

AU - Jagodic, M.

AU - Koch, K.

AU - Rosner, H.

AU - Margadonna, S.

AU - Lv, B.

AU - Guloy, A. M.

AU - Arcon, D.

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N2 - 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.

AB - 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.

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DO - 10.1103/PhysRevB.81.140511

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VL - 81

SP - -

JO - Physical review B

JF - Physical review B

IS - 14

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ER -

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

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