Electric field gradient in ferromagnetic iron measured with beta-detected modulated adiabatic passage on oriented nuclei

W. D. Hutchison*, D. H. Chaplin, S. Ohya, S. Muto, K. Nishimura, H. Sato, Y. Kawamura, A. E. Stuchbery

*Corresponding author for this work

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    Abstract

    Modulated adiabatic passage on oriented nuclei has been used in combination with beta-ray detection to make a definitive measurement of a nuclear electric quadrupole hyperfine interaction in elemental iron. For 59Fe in single-crystal iron magnetized along the easy (100) direction P/h=3eQVZZ/4I(2I-1)h = + 19.4(5) kHz, and along the hard (111) direction P/h = + 20.2(5) kHz. Theoretical estimates for the 59Fe ground-state nuclear electric quadrupole moment are considered in terms of the particle-rotor model and the shell model. A value of Q = +0.19(3) b is adopted, which, in turn, is used to obtain electric field gradient values at the Fe site of VZZ = + 1.7(3) × 1019 V m-2 and + 1.8(3) × 1019 Vm-2 for magnetization along the easy and hard directions, respectively. Comparisons are made with previously measured results for the nearby 3d impurities Mn and Co in Fe.

    Original languageEnglish
    Article number134425
    Pages (from-to)1344251-1344258
    Number of pages8
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume66
    Issue number13
    Publication statusPublished - 1 Oct 2002

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