We presented a detailed nuclear magnetic resonance (NMR) study of the normal state properties of LiFeAs, Na1FeAs and Na0.9FeAs polycrystalline samples, the so-called ‘111’ members of newly discovered family of Fe-based superconductors. Our NMR experiments demonstrate the absence of a structural phase transition and antiferomagnetic (AFM) ordering in LiFeAs down to Tc, whereas Na1FeAs and Na0.9FeAs, which are structural analogues of LiFeAs, show the AFM ordering at TN = 44 K and 50 K, respectively, with small Fe moment.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 23833895We presented a detailed study of 75As NMR Knight shift and spin-lattice relaxation rate 1/T1 in the normal state of stoichiometric polycrystalline LiFeAs, which suggest the presence of antiferromagnetic (AFM) fluctuations in this material, which may be important for the pairing mechanism of Cooper pairs.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 23398183