English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We report results of 23Na and 75As nuclear magnetic resonance (NMR)experiments on a self-flux grown high-quality single crystal of stoichiometricNaFeAs. The NMR spectra revealed a tetragonal to twinned-orthorhombicstructural phase transition at T_O = 57 K and an antiferromagnetic (AF)transition at T_AF = 45 K. The divergent behavior of nuclear relaxation ratenear T_AF shows significant anisotropy, indicating that the critical slowingdown of stripe-type AF fluctuations are strongly anisotropic in spin space. TheNMR spectra at low enough temperatures consist of sharp peaks showing acommensurate stripe AF order with a small moment \sim 0.3 muB. However, thespectra just below T_AF exhibits highly asymmetric broadening pointing to anincommensurate modulation. The commensurate-incommensurate crossover in NaFeAsshows a certain similarity to the behavior of SrFe2As2 under high pressure.

Crossover from commensurate to incommensurate antiferromagnetism in stoichiometric NaFeAs revealed by single-crystal 23Na,75As-NMR experiments