Microscopic study of the effect of impurities on the first order spin density wave transition in BaFe$_2$As$_2$

S. -H. Baek; T. Klimczuk; F. Ronning; E. D. Bauer; J. D. Thompson; N. J. Curro

doi:10.1103/PhysRevB.78.212509

Microscopic study of the effect of impurities on the first order spin density wave transition in BaFe$_2$As$_2$

Strongly Correlated Electrons 2009-01-01 v4 Superconductivity

Authors: S. -H. Baek , T. Klimczuk , F. Ronning , E. D. Bauer , J. D. Thompson , N. J. Curro

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Abstract

We report an $^{75}$ As NMR study of BaFe $_2$ As $_2$ in both single crystals and polycrystal forms. We find that Sn impurities in the single crystal dramatically alter the low energy spin fluctuations and suppress the ordering temperature from 138 K to 85 K. In contrast to Sn-free samples, we find that the temperature dependence of the $^{75}$ As NMR spectra and spin lattice relaxation rates reveal a second order phase transition to a state of incommensurate magnetic order.

Keywords

impurity effect spin density wave BaFe$_2$As$_2$ NMR study spin fluctuations phase transition incommensurate magnetic order Sn impurities

Cite

@article{arxiv.0807.1084,
  title  = {Microscopic study of the effect of impurities on the first order spin density wave transition in BaFe$_2$As$_2$},
  author = {S. -H. Baek and T. Klimczuk and F. Ronning and E. D. Bauer and J. D. Thompson and N. J. Curro},
  journal= {arXiv preprint arXiv:0807.1084},
  year   = {2009}
}

Comments

4 pages, 4 figures ; extensive and significant changes have been made to the previous version, focusing on the effect of impurities on the intrinsic physics

Microscopic study of the effect of impurities on the first order spin density wave transition in BaFe$_2$As$_2$

Abstract

Keywords

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