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Journal of Superconductivity and Novel Magnetism

, Volume 31, Issue 10, pp 3289–3295 | Cite as

75As NMR and XRD Study of Structural and Electronic Inhomogeneities in Ba(Fe1−xNix)2As2

  • E. G. Nikolaev
  • L. B. Lugansky
  • V. A. Vlasenko
  • K. S. Pervakov
  • V. P. Martovitsky
  • Yu. F. Eltsev
  • S. L. Bud’ko
  • P. C. Canfield
Original Paper
  • 52 Downloads

Abstract

We have used 75As NMR and x-ray diffraction analysis to study the structural and electronic inhomogeneities in Ba(Fe1−xNix)2As2 crystals with x near the border of the antiferromagnetic domain. Unequal nickel population of the equivalent Fe planes and rather homogeneous distribution of Ni inside the planes have been found in the well-ordered single crystal with x = 0.036. Below 40 K a signal wipeout of 75As NMR spectra is observed for the crystals with x = 0.036 and 0.037. This fact together with spin-lattice relaxation peculiarities is treated a result of the system glassy behavior in this region of the phase diagram. The 75As NMR data also indicate on partial suppression of antiferromagnetic spin fluctuations around the Ni impurity in these crystals at low temperatures.

Keywords

Iron-based superconductor NMR x-ray diffraction Antiferromagnetism Inhomogeneity Glassy behavior 

Notes

Acknowledgements

We thank N. Ni and S. Ran for the help in sample synthesis.

Funding Information

This work was supported by the Program No. 4 ”Actual problems of low temperature physics” of the Presidium of the Russian Academy of Sciences, by Russian Science Foundation under Grant No. 16-12-10507, and by Russian Foundation for Basic Research under Grant No. 16-32-00663. Work at the Ames Laboratory was supported by the U.S. Department of Energy, Office of Basic Energy Science, Division of Materials Sciences and Engineering under Contract No. DE-AC02-07CH11358.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • E. G. Nikolaev
    • 1
  • L. B. Lugansky
    • 1
  • V. A. Vlasenko
    • 2
  • K. S. Pervakov
    • 2
  • V. P. Martovitsky
    • 2
  • Yu. F. Eltsev
    • 2
  • S. L. Bud’ko
    • 3
  • P. C. Canfield
    • 3
  1. 1.P.L. Kapitza Institute for Physical Problems RASMoscowRussian Federation
  2. 2.P.N. Lebedev Physical Institute RASMoscowRussian Federation
  3. 3.Ames Laboratory U.S. DOE and Department of Physics and AstronomyIowa State UniversityAmesUSA

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